Re: [Cal_Boats] LED for running/navigation lights

I have a friend who is marketing his design for LED replacement lights, his base uses electronics instead of a resistor to limit the current. The point is to keep full brightness at low voltages and to not shorten the lifetime of the LED or burn it out with high voltage. He used to keep a variable power source with him with volt and ammeter to show that the brightness of his lamps didn't change with varying voltage and the current draw remained constant. Dr. LED John Courter Cal 40 Strider From: "ti… [at] ch2m.com" <ti… [at] ch2m.com> To: Ca… [at] yahoogroups.com Sent: Tuesday, January 16, 2007 4:04:45 PM Subject: RE: [Cal_Boats] LED for running/navigation lights So far the only problem I've discovered is when my alternator went to 16 volts during a delivery, the green LED burned out... You also have to be careful with the polarity on the Luxeon.. reverse will blow up the light... Recent Activity 6New Members Visit Your Group SPONSORED LINKS Sailing Boating Sailing boat Boating sailing Yahoo! News Entertainment News The latest on stars, movies, and more Y! Toolbar Get it Free! easy 1-click access to your groups. Yahoo! Groups Start a group in 3 easy steps. Connect with others.. It's here! Your new message! Get new email alerts with the free Yahoo! Toolbar. http://tools.search.yahoo.com/toolbar/features/mail/

I was wondering how "natural" the light is from these "super bright" LEDs. I do know that I hate the light from those high tech car headlights, and also am not partial to most neon light. I guess I am am more into the yellower light from most light bulbs. I suppose a small switching regulator could be placed in the battery hole on these babies, or else a pad resistor would be required for 12VDC hook-up. Problem with pad resistor is that intensity would vary when alternator is on. Cheers Charlie From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of Bruce Stirling Sent: Thursday, January 18, 2007 10:49 AM To: Ca… [at] yahoogroups.com Subject: RE: [Cal_Boats] LED for running/navigation lights Costco had a deal just before Christmas on a package of three LED lights, each having five (5) "super bright" white LEDs per light. All for about $20.00. They are battery operated, on-off switch, and the light head swivels and pivots for "ideal light positions." Three AAA batteries per light. They are called "LUMEN" and they are warrantied for two years. They attach with either velcro or a screw. I posted a photo online here: http://www.stirlinglaw.com/cal28/lumen.jpg http://www.stirlinglaw.com/cal28/lumen2.jpg {give me a minute to post them up there} From: "edwardperrow" <ed… [at] yahoo.com <mailto:edwardperrow%40yahoo.com> > To: <Ca… [at] yahoogroups.com <mailto:Cal_Boats%40yahoogroups.com> > Sent: Tuesday, January 16, 2007 10:38 AM Subject: [Cal_Boats] LED for running/navigation lights >I am incrementally replacing my cabin light bulbs with LED clusters and > would like to replace my navigation light bults with LEDs AND HAVE > SEVERAL QUESTIONS; (i) are there USCG issues, (ii) any suggestions for > sources and (iii) what are others experience with the nav/running light > options? > > Thanks and fair winds, > > Ed Perrow > CAL 25-2, Spirit > Lake Lanier, GA > > > > > Yahoo! Groups Links > > > > >

I bought a bunch of these for the hanging locker, lazarette, engine space, cabin . They work fine and can be directed about 30 degrees . They are a good backup especially since the battieries are home for the winter. Once i used them for a short while, the cabin incandescent lights looked strangely yellow. Each "hockeypuck" has 5 led. Then i went a little nuts and put them in every closet at home that had no light, parts of the barn that had no power, and on the dash of my 1960 jeep. It would not stay on the cat. drew ratchelous -tyler 29 - cal 29 crew new haven ct >From: "Husar, Charlie" <hu… [at] bah.com> >Reply-To: Ca… [at] yahoogroups.com >To: <Ca… [at] yahoogroups.com> >Subject: RE: [Cal_Boats] LED for running/navigation lights >Date: Thu, 18 Jan 2007 11:08:11 -0500 > >I was wondering how "natural" the light is from these "super bright" >LEDs. I do know that I hate the light from those high tech car >headlights, and also am not partial to most neon light. I guess I am am >more into the yellower light from most light bulbs. > >I suppose a small switching regulator could be placed in the battery >hole on these babies, or else a pad resistor would be required for 12VDC >hook-up. Problem with pad resistor is that intensity would vary when >alternator is on. > >Cheers >Charlie > >________________________________ > >From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On >Behalf Of Bruce Stirling >Sent: Thursday, January 18, 2007 10:49 AM >To: Ca… [at] yahoogroups.com >Subject: RE: [Cal_Boats] LED for running/navigation lights > > > > >Costco had a deal just before Christmas on a package of three LED >lights, each having five (5) "super bright" white LEDs per light. All >for about $20.00. They are battery operated, on-off switch, and the >light head swivels and pivots for "ideal light positions." Three AAA >batteries per light. They are called "LUMEN" and they are warrantied >for two years. They attach with either velcro or a screw. > > > >I posted a photo online here: > >http://www.stirlinglaw.com/cal28/lumen.jpg > >http://www.stirlinglaw.com/cal28/lumen2.jpg > >{give me a minute to post them up there} > > > > >----- Original Message ----- >From: "edwardperrow" <ed… [at] yahoo.com ><mailto:edwardperrow%40yahoo.com> > >To: <Ca… [at] yahoogroups.com <mailto:Cal_Boats%40yahoogroups.com> > >Sent: Tuesday, January 16, 2007 10:38 AM >Subject: [Cal_Boats] LED for running/navigation lights > > >I am incrementally replacing my cabin light bulbs with LED clusters and > > would like to replace my navigation light bults with LEDs AND HAVE > > SEVERAL QUESTIONS; (i) are there USCG issues, (ii) any suggestions for > > sources and (iii) what are others experience with the nav/running >light > > options? > > > > Thanks and fair winds, > > > > Ed Perrow > > CAL 25-2, Spirit > > Lake Lanier, GA > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > Type your favorite song.� Get a customized station.� Try MSN Radio powered by Pandora. http://radio.msn.com/?icid=T002MSN03A07001

Maybe I am mis-understanding what you're trying to do, but if you're trying to make the color softer on LEDs by varying the current, it won't work. LEDs will get dimmer but the frequency (color) of the light will not vary. John Courter From: "Husar, Charlie" <hu… [at] bah.com> To: Ca… [at] yahoogroups.com Sent: Thursday, January 18, 2007 8:08:11 AM Subject: RE: [Cal_Boats] LED for running/navigation lights I was wondering how "natural" the light is from these "super bright" LEDs. I do know that I hate the light from those high tech car headlights, and also am not partial to most neon light. I guess I am am more into the yellower light from most light bulbs. I suppose a small switching regulator could be placed in the battery hole on these babies, or else a pad resistor would be required for 12VDC hook-up. Problem with pad resistor is that intensity would vary when alternator is on. Cheers Charlie From: Cal_Boats@yahoogrou ps.com [mailto:Cal_ Boats@yahoogroup s.com] On Behalf Of Bruce Stirling Sent: Thursday, January 18, 2007 10:49 AM To: Cal_Boats@yahoogrou ps.com Subject: RE: [Cal_Boats] LED for running/navigation lights Costco had a deal just before Christmas on a package of three LED lights, each having five (5) "super bright" white LEDs per light. All for about $20.00. They are battery operated, on-off switch, and the light head swivels and pivots for "ideal light positions." Three AAA batteries per light. They are called "LUMEN" and they are warrantied for two years. They attach with either velcro or a screw. I posted a photo online here: http://www.stirling law.com/cal28/ lumen.jpg http://www.stirling law.com/cal28/ lumen2.jpg {give me a minute to post them up there} From: "edwardperrow" <edwardperrow@ yahoo.com> To: <Cal_Boats@yahoogrou ps.com> Sent: Tuesday, January 16, 2007 10:38 AM Subject: [Cal_Boats] LED for running/navigation lights >I am incrementally replacing my cabin light bulbs with LED clusters and > would like to replace my navigation light bults with LEDs AND HAVE > SEVERAL QUESTIONS; (i) are there USCG issues, (ii) any suggestions for > sources and (iii) what are others experience with the nav/running light > options? > > Thanks and fair winds, > > Ed Perrow > CAL 25-2, Spirit > Lake Lanier, GA > > > > > Yahoo! Groups Links > > > > > Never Miss an Email Stay connected with Yahoo! Mail on your mobile. Get started! http://mobile.yahoo.com/services?promote=mail

Not thinking about making the color softer, John. Your point is understood. It's the whole idea behind how LEDs work. Quantum states and all that good stuff. I was just wonderering how brash the light from the white LED sources is. I assume the WHITE LEDs are a mix of many monochromatic LEDs of different colors. If that is the case, and the current could be controlled to each monochrome LED separately, then indeed we could adjust the hue. Cheers Charlie From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of John Courter Sent: Thursday, January 18, 2007 12:39 PM To: Ca… [at] yahoogroups.com Subject: Re: [Cal_Boats] LED for running/navigation lights Maybe I am mis-understanding what you're trying to do, but if you're trying to make the color softer on LEDs by varying the current, it won't work. LEDs will get dimmer but the frequency (color) of the light will not vary. John Courter From: "Husar, Charlie" <hu… [at] bah.com> To: Ca… [at] yahoogroups.com Sent: Thursday, January 18, 2007 8:08:11 AM Subject: RE: [Cal_Boats] LED for running/navigation lights I was wondering how "natural" the light is from these "super bright" LEDs. I do know that I hate the light from those high tech car headlights, and also am not partial to most neon light. I guess I am am more into the yellower light from most light bulbs. I suppose a small switching regulator could be placed in the battery hole on these babies, or else a pad resistor would be required for 12VDC hook-up. Problem with pad resistor is that intensity would vary when alternator is on. Cheers Charlie From: Cal_Boats@yahoogrou ps.com [mailto:Cal_ Boats@yahoogroup s.com] On Behalf Of Bruce Stirling Sent: Thursday, January 18, 2007 10:49 AM To: Cal_Boats@yahoogrou ps.com Subject: RE: [Cal_Boats] LED for running/navigation lights Costco had a deal just before Christmas on a package of three LED lights, each having five (5) "super bright" white LEDs per light. All for about $20.00. They are battery operated, on-off switch, and the light head swivels and pivots for "ideal light positions." Three AAA batteries per light. They are called "LUMEN" and they are warrantied for two years. They attach with either velcro or a screw. I posted a photo online here: http://www.stirling law.com/cal28/ lumen.jpg <http://www.stirlinglaw.com/cal28/lumen.jpg> http://www.stirling law.com/cal28/ lumen2.jpg <http://www.stirlinglaw.com/cal28/lumen2.jpg> {give me a minute to post them up there} From: "edwardperrow" <edwardperrow@ yahoo.com <mailto:edwardperrow%40yahoo.com> > To: <Cal_Boats@yahoogrou ps.com <mailto:Cal_Boats%40yahoogroups.com> > Sent: Tuesday, January 16, 2007 10:38 AM Subject: [Cal_Boats] LED for running/navigation lights >I am incrementally replacing my cabin light bulbs with LED clusters and > would like to replace my navigation light bults with LEDs AND HAVE > SEVERAL QUESTIONS; (i) are there USCG issues, (ii) any suggestions for > sources and (iii) what are others experience with the nav/running light > options? > > Thanks and fair winds, > > Ed Perrow > CAL 25-2, Spirit > Lake Lanier, GA > > > > > Yahoo! Groups Links > > > > > Want to start your own business? Learn how on Yahoo! Small Business. <http://us.rd.yahoo.com/evt=41244/*http://smallbusiness.yahoo.com/r-inde x>

Check out the Luxeon Lights, One LED, White light, in 1, 3, or 5 watts. Link through the superbright link on early thread \ From: Ca… [at] yahoogroups.com on behalf of Husar, Charlie Sent: Thu 1/18/2007 11:39 AM To: Ca… [at] yahoogroups.com Subject: RE: [Cal_Boats] LED for running/navigation lights Not thinking about making the color softer, John. Your point is understood. It's the whole idea behind how LEDs work. Quantum states and all that good stuff. I was just wonderering how brash the light from the white LED sources is. I assume the WHITE LEDs are a mix of many monochromatic LEDs of different colors. If that is the case, and the current could be controlled to each monochrome LED separately, then indeed we could adjust the hue. Cheers Charlie From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of John Courter Sent: Thursday, January 18, 2007 12:39 PM To: Ca… [at] yahoogroups.com Subject: Re: [Cal_Boats] LED for running/navigation lights Maybe I am mis-understanding what you're trying to do, but if you're trying to make the color softer on LEDs by varying the current, it won't work. LEDs will get dimmer but the frequency (color) of the light will not vary. John Courter From: "Husar, Charlie" <hu… [at] bah.com> To: Ca… [at] yahoogroups.com Sent: Thursday, January 18, 2007 8:08:11 AM Subject: RE: [Cal_Boats] LED for running/navigation lights I was wondering how "natural" the light is from these "super bright" LEDs. I do know that I hate the light from those high tech car headlights, and also am not partial to most neon light. I guess I am am more into the yellower light from most light bulbs. I suppose a small switching regulator could be placed in the battery hole on these babies, or else a pad resistor would be required for 12VDC hook-up. Problem with pad resistor is that intensity would vary when alternator is on. Cheers Charlie From: Cal_Boats@yahoogrou ps.com [mailto:Cal_ Boats@yahoogroup s.com] On Behalf Of Bruce Stirling Sent: Thursday, January 18, 2007 10:49 AM To: Cal_Boats@yahoogrou ps.com Subject: RE: [Cal_Boats] LED for running/navigation lights Costco had a deal just before Christmas on a package of three LED lights, each having five (5) "super bright" white LEDs per light. All for about $20.00. They are battery operated, on-off switch, and the light head swivels and pivots for "ideal light positions." Three AAA batteries per light. They are called "LUMEN" and they are warrantied for two years. They attach with either velcro or a screw. I posted a photo online here: http://www.stirling law.com/cal28/ lumen.jpg <http://www.stirlinglaw.com/cal28/lumen.jpg> http://www.stirling law.com/cal28/ lumen2.jpg <http://www.stirlinglaw.com/cal28/lumen2.jpg> {give me a minute to post them up there} From: "edwardperrow" <edwardperrow@ yahoo.com <mailto:edwardperrow%40yahoo.com> > To: <Cal_Boats@yahoogrou ps.com <mailto:Cal_Boats%40yahoogroups.com> > Sent: Tuesday, January 16, 2007 10:38 AM Subject: [Cal_Boats] LED for running/navigation lights >I am incrementally replacing my cabin light bulbs with LED clusters and > would like to replace my navigation light bults with LEDs AND HAVE > SEVERAL QUESTIONS; (i) are there USCG issues, (ii) any suggestions for > sources and (iii) what are others experience with the nav/running light > options? > > Thanks and fair winds, > > Ed Perrow > CAL 25-2, Spirit > Lake Lanier, GA > > > > > Yahoo! Groups Links > > > > > Want to start your own business? Learn how on Yahoo! Small Business. <http://us.rd.yahoo.com/evt=41244/*http://smallbusiness.yahoo.com/r-index>

The lights have a bluish hint From: Ca… [at] yahoogroups.com on behalf of Husar, Charlie Sent: Thu 1/18/2007 8:08 AM To: Ca… [at] yahoogroups.com Subject: RE: [Cal_Boats] LED for running/navigation lights I was wondering how "natural" the light is from these "super bright" LEDs. I do know that I hate the light from those high tech car headlights, and also am not partial to most neon light. I guess I am am more into the yellower light from most light bulbs. I suppose a small switching regulator could be placed in the battery hole on these babies, or else a pad resistor would be required for 12VDC hook-up. Problem with pad resistor is that intensity would vary when alternator is on. Cheers Charlie From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of Bruce Stirling Sent: Thursday, January 18, 2007 10:49 AM To: Ca… [at] yahoogroups.com Subject: RE: [Cal_Boats] LED for running/navigation lights Costco had a deal just before Christmas on a package of three LED lights, each having five (5) "super bright" white LEDs per light. All for about $20.00. They are battery operated, on-off switch, and the light head swivels and pivots for "ideal light positions." Three AAA batteries per light. They are called "LUMEN" and they are warrantied for two years. They attach with either velcro or a screw. I posted a photo online here: http://www.stirlinglaw.com/cal28/lumen.jpg <http://www.stirlinglaw.com/cal28/lumen.jpg> http://www.stirlinglaw.com/cal28/lumen2.jpg <http://www.stirlinglaw.com/cal28/lumen2.jpg> {give me a minute to post them up there} From: "edwardperrow" <ed… [at] yahoo.com <mailto:edwardperrow%40yahoo.com> > To: <Ca… [at] yahoogroups.com <mailto:Cal_Boats%40yahoogroups.com> > Sent: Tuesday, January 16, 2007 10:38 AM Subject: [Cal_Boats] LED for running/navigation lights >I am incrementally replacing my cabin light bulbs with LED clusters and > would like to replace my navigation light bults with LEDs AND HAVE > SEVERAL QUESTIONS; (i) are there USCG issues, (ii) any suggestions for > sources and (iii) what are others experience with the nav/running light > options? > > Thanks and fair winds, > > Ed Perrow > CAL 25-2, Spirit > Lake Lanier, GA > > > > > Yahoo! Groups Links > > > > >

This wikipedia website says the same thing that my electronics goto guy says, which is that most are blue LEDs, with a phosphor in front. Scroll down about a 1/3 of the way and you'll see the spectrum where the spike is the blue LED and the rest of the light frequencies are due to the phosphor. http://en.wikipedia.org/wiki/LED Here's a tidbit. Did you know that the efficiency (lumens/watt) of white LEDs is just in the last year becoming as good or slightly better than an incandescant bulb? For general lighting you get much more light from a fluorescent than an LED for the same amount of battery used up. White LEDs have been getting better almost every year, but it has been around 16 lumens/watt. Here's a table with different types of light efficiencies. http://www.mge.com/home/appliances/lighting/comparison.htm Here's a site that says why LEDs are good for special apps like flashlights. http://members.misty.com/don/lede.html John Courter "Husar, Charlie" <hu… [at] bah.com> wrote: Not thinking about making the color softer, John. Your point is understood. It's the whole idea behind how LEDs work. Quantum states and all that good stuff. I was just wonderering how brash the light from the white LED sources is. I assume the WHITE LEDs are a mix of many monochromatic LEDs of different colors. If that is the case, and the current could be controlled to each monochrome LED separately, then indeed we could adjust the hue. Cheers Charlie --------------------------------- From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of John Courter Sent: Thursday, January 18, 2007 12:39 PM To: Ca… [at] yahoogroups.com Subject: Re: [Cal_Boats] LED for running/navigation lights Maybe I am mis-understanding what you're trying to do, but if you're trying to make the color softer on LEDs by varying the current, it won't work. LEDs will get dimmer but the frequency (color) of the light will not vary. John Courter ----- Original Message ---- From: "Husar, Charlie" <hu… [at] bah.com> To: Ca… [at] yahoogroups.com Sent: Thursday, January 18, 2007 8:08:11 AM Subject: RE: [Cal_Boats] LED for running/navigation lights I was wondering how "natural" the light is from these "super bright" LEDs. I do know that I hate the light from those high tech car headlights, and also am not partial to most neon light. I guess I am am more into the yellower light from most light bulbs. I suppose a small switching regulator could be placed in the battery hole on these babies, or else a pad resistor would be required for 12VDC hook-up. Problem with pad resistor is that intensity would vary when alternator is on. Cheers Charlie --------------------------------- From: Cal_Boats@yahoogrou ps.com [mailto:Cal_ Boats@yahoogroup s.com] On Behalf Of Bruce Stirling Sent: Thursday, January 18, 2007 10:49 AM To: Cal_Boats@yahoogrou ps.com Subject: RE: [Cal_Boats] LED for running/navigation lights Costco had a deal just before Christmas on a package of three LED lights, each having five (5) "super bright" white LEDs per light. All for about $20.00. They are battery operated, on-off switch, and the light head swivels and pivots for "ideal light positions." Three AAA batteries per light. They are called "LUMEN" and they are warrantied for two years. They attach with either velcro or a screw. I posted a photo online here: http://www.stirling law.com/cal28/ lumen.jpg http://www.stirling law.com/cal28/ lumen2.jpg {give me a minute to post them up there} From: "edwardperrow" <edwardperrow@ yahoo.com> To: <Cal_Boats@yahoogrou ps.com> Sent: Tuesday, January 16, 2007 10:38 AM Subject: [Cal_Boats] LED for running/navigation lights >I am incrementally replacing my cabin light bulbs with LED clusters and > would like to replace my navigation light bults with LEDs AND HAVE > SEVERAL QUESTIONS; (i) are there USCG issues, (ii) any suggestions for > sources and (iii) what are others experience with the nav/running light > options? > > Thanks and fair winds, > > Ed Perrow > CAL 25-2, Spirit > Lake Lanier, GA > > > > > Yahoo! Groups Links > > > > > --------------------------------- Want to start your own business? Learn how on Yahoo! Small Business. --------------------------------- Bored stiff? Loosen up... Download and play hundreds of games for free on Yahoo! Games.

The Luxeon LEDs are around 40-54 lumens per watt, depending on the color, as I recall From: Ca… [at] yahoogroups.com on behalf of John Courter Sent: Thu 1/18/2007 8:32 PM To: Ca… [at] yahoogroups.com Subject: RE: [Cal_Boats] LED for running/navigation lights This wikipedia website says the same thing that my electronics goto guy says, which is that most are blue LEDs, with a phosphor in front. Scroll down about a 1/3 of the way and you'll see the spectrum where the spike is the blue LED and the rest of the light frequencies are due to the phosphor. http://en.wikipedia.org/wiki/LED <http://en.wikipedia.org/wiki/LED> Here's a tidbit. Did you know that the efficiency (lumens/watt) of white LEDs is just in the last year becoming as good or slightly better than an incandescant bulb? For general lighting you get much more light from a fluorescent than an LED for the same amount of battery used up. White LEDs have been getting better almost every year, but it has been around 16 lumens/watt. Here's a table with different types of light efficiencies. http://www.mge.com/home/appliances/lighting/comparison.htm <http://www.mge.com/home/appliances/lighting/comparison.htm> Here's a site that says why LEDs are good for special apps like flashlights. http://members.misty.com/don/lede.html <http://members.misty.com/don/lede.html> John Courter "Husar, Charlie" <hu… [at] bah.com> wrote: Not thinking about making the color softer, John. Your point is understood. It's the whole idea behind how LEDs work. Quantum states and all that good stuff. I was just wonderering how brash the light from the white LED sources is. I assume the WHITE LEDs are a mix of many monochromatic LEDs of different colors. If that is the case, and the current could be controlled to each monochrome LED separately, then indeed we could adjust the hue. Cheers Charlie From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of John Courter Sent: Thursday, January 18, 2007 12:39 PM To: Ca… [at] yahoogroups.com Subject: Re: [Cal_Boats] LED for running/navigation lights Maybe I am mis-understanding what you're trying to do, but if you're trying to make the color softer on LEDs by varying the current, it won't work. LEDs will get dimmer but the frequency (color) of the light will not vary. John Courter ----- Original Message ---- From: "Husar, Charlie" <hu… [at] bah.com> To: Ca… [at] yahoogroups.com Sent: Thursday, January 18, 2007 8:08:11 AM Subject: RE: [Cal_Boats] LED for running/navigation lights I was wondering how "natural" the light is from these "super bright" LEDs. I do know that I hate the light from those high tech car headlights, and also am not partial to most neon light. I guess I am am more into the yellower light from most light bulbs. I suppose a small switching regulator could be placed in the battery hole on these babies, or else a pad resistor would be required for 12VDC hook-up. Problem with pad resistor is that intensity would vary when alternator is on. Cheers Charlie From: Cal_Boats@yahoogrou ps.com [mailto:Cal_ Boats@yahoogroup s.com] On Behalf Of Bruce Stirling Sent: Thursday, January 18, 2007 10:49 AM To: Cal_Boats@yahoogrou ps.com Subject: RE: [Cal_Boats] LED for running/navigation lights Costco had a deal just before Christmas on a package of three LED lights, each having five (5) "super bright" white LEDs per light. All for about $20.00. They are battery operated, on-off switch, and the light head swivels and pivots for "ideal light positions." Three AAA batteries per light. They are called "LUMEN" and they are warrantied for two years. They attach with either velcro or a screw. I posted a photo online here: http://www.stirling law.com/cal28/ lumen.jpg <http://www.stirlinglaw.com/cal28/lumen.jpg> http://www.stirling law.com/cal28/ lumen2.jpg <http://www.stirlinglaw.com/cal28/lumen2.jpg> {give me a minute to post them up there} ----- Original Message ----- From: "edwardperrow" <edwardperrow@ yahoo.com <mailto:edwardperrow%40yahoo.com> > To: <Cal_Boats@yahoogrou ps.com <mailto:Cal_Boats%40yahoogroups.com> > Sent: Tuesday, January 16, 2007 10:38 AM Subject: [Cal_Boats] LED for running/navigation lights >I am incrementally replacing my cabin light bulbs with LED clusters and > would like to replace my navigation light bults with LEDs AND HAVE > SEVERAL QUESTIONS; (i) are there USCG issues, (ii) any suggestions for > sources and (iii) what are others experience with the nav/running light > options? > > Thanks and fair winds, > > Ed Perrow > CAL 25-2, Spirit > Lake Lanier, GA > > > > > Yahoo! Groups Links > > > > > Want to start your own business? Learn how on Yahoo! Small Business. <http://us.rd.yahoo.com/evt=41244/*http://smallbusiness.yahoo.com/r-index> Bored stiff? <http://us.rd.yahoo.com/evt=49935/*http://games.yahoo.com> Loosen up... Download and play hundreds of games for free <http://us.rd.yahoo.com/evt=49935/*http://games.yahoo.com> on Yahoo! Games.

Thanks, John. Interesting stuff. I remember in my whipper-snapper bench circuit design days, we all oohed and aahed at the first red LED (rhymes with dead). Problem was that if you made a matrix of them to make digits or some such, and one blew, you had to replace all of them because they lost intensity so quickly (kind of a half life). Then came the greenies, and the yellows. As I recall blue was a real effort to create. Since I prefer the yellowish to the bluish cast, I now start thinking that surrounding the bluish white with some red and greens might give a more desirable result. Just meandering here. Cheers Charlie From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of John Courter Sent: Thursday, January 18, 2007 11:33 PM To: Ca… [at] yahoogroups.com Subject: RE: [Cal_Boats] LED for running/navigation lights This wikipedia website says the same thing that my electronics goto guy says, which is that most are blue LEDs, with a phosphor in front. Scroll down about a 1/3 of the way and you'll see the spectrum where the spike is the blue LED and the rest of the light frequencies are due to the phosphor. http://en.wikipedia.org/wiki/LED Here's a tidbit. Did you know that the efficiency (lumens/watt) of white LEDs is just in the last year becoming as good or slightly better than an incandescant bulb? For general lighting you get much more light from a fluorescent than an LED for the same amount of battery used up. White LEDs have been getting better almost every year, but it has been around 16 lumens/watt. Here's a table with different types of light efficiencies. http://www.mge.com/home/appliances/lighting/comparison.htm Here's a site that says why LEDs are good for special apps like flashlights. http://members.misty.com/don/lede.html John Courter "Husar, Charlie" <hu… [at] bah.com> wrote: Not thinking about making the color softer, John. Your point is understood. It's the whole idea behind how LEDs work. Quantum states and all that good stuff. I was just wonderering how brash the light from the white LED sources is. I assume the WHITE LEDs are a mix of many monochromatic LEDs of different colors. If that is the case, and the current could be controlled to each monochrome LED separately, then indeed we could adjust the hue. Cheers Charlie From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of John Courter Sent: Thursday, January 18, 2007 12:39 PM To: Ca… [at] yahoogroups.com Subject: Re: [Cal_Boats] LED for running/navigation lights Maybe I am mis-understanding what you're trying to do, but if you're trying to make the color softer on LEDs by varying the current, it won't work. LEDs will get dimmer but the frequency (color) of the light will not vary. John Courter ----- Original Message ---- From: "Husar, Charlie" <hu… [at] bah.com> To: Ca… [at] yahoogroups.com Sent: Thursday, January 18, 2007 8:08:11 AM Subject: RE: [Cal_Boats] LED for running/navigation lights I was wondering how "natural" the light is from these "super bright" LEDs. I do know that I hate the light from those high tech car headlights, and also am not partial to most neon light. I guess I am am more into the yellower light from most light bulbs. I suppose a small switching regulator could be placed in the battery hole on these babies, or else a pad resistor would be required for 12VDC hook-up. Problem with pad resistor is that intensity would vary when alternator is on. Cheers Charlie From: Cal_Boats@yahoogrou ps.com [mailto:Cal_ Boats@yahoogroup s.com] On Behalf Of Bruce Stirling Sent: Thursday, January 18, 2007 10:49 AM To: Cal_Boats@yahoogrou ps.com Subject: RE: [Cal_Boats] LED for running/navigation lights Costco had a deal just before Christmas on a package of three LED lights, each having five (5) "super bright" white LEDs per light. All for about $20.00. They are battery operated, on-off switch, and the light head swivels and pivots for "ideal light positions." Three AAA batteries per light. They are called "LUMEN" and they are warrantied for two years. They attach with either velcro or a screw. I posted a photo online here: http://www.stirling law.com/cal28/ lumen.jpg <http://www.stirlinglaw.com/cal28/lumen.jpg> http://www.stirling law.com/cal28/ lumen2.jpg <http://www.stirlinglaw.com/cal28/lumen2.jpg> {give me a minute to post them up there} ----- Original Message ----- From: "edwardperrow" <edwardperrow@ yahoo.com <mailto:edwardperrow%40yahoo.com> > To: <Cal_Boats@yahoogrou ps.com <mailto:Cal_Boats%40yahoogroups.com> > Sent: Tuesday, January 16, 2007 10:38 AM Subject: [Cal_Boats] LED for running/navigation lights >I am incrementally replacing my cabin light bulbs with LED clusters and > would like to replace my navigation light bults with LEDs AND HAVE > SEVERAL QUESTIONS; (i) are there USCG issues, (ii) any suggestions for > sources and (iii) what are others experience with the nav/running light > options? > > Thanks and fair winds, > > Ed Perrow > CAL 25-2, Spirit > Lake Lanier, GA > > > > > Yahoo! Groups Links > > > > > Want to start your own business? Learn how on Yahoo! Small Business. <http://us.rd.yahoo.com/evt=41244/*http://smallbusiness.yahoo.com/r-inde x> Bored stiff? <http://us.rd.yahoo.com/evt=49935/*http://games.yahoo.com> Loosen up... Download and play hundreds of games for free <http://us.rd.yahoo.com/evt=49935/*http://games.yahoo.com> on Yahoo! Games.

The 16 lumens/watt that I remember is from a year or so ago, the bottom website in my last post even says that they're now up in that range, I just wasn't reading that part carefully. We're just talking about white here. John Courter ti… [at] ch2m.com wrote: The Luxeon LEDs are around 40-54 lumens per watt, depending on the color, as I recall --------------------------------- From: Ca… [at] yahoogroups.com on behalf of John Courter Sent: Thu 1/18/2007 8:32 PM To: Ca… [at] yahoogroups.com Subject: RE: [Cal_Boats] LED for running/navigation lights This wikipedia website says the same thing that my electronics goto guy says, which is that most are blue LEDs, with a phosphor in front. Scroll down about a 1/3 of the way and you'll see the spectrum where the spike is the blue LED and the rest of the light frequencies are due to the phosphor. http://en.wikipedia.org/wiki/LED Here's a tidbit. Did you know that the efficiency (lumens/watt) of white LEDs is just in the last year becoming as good or slightly better than an incandescant bulb? For general lighting you get much more light from a fluorescent than an LED for the same amount of battery used up. White LEDs have been getting better almost every year, but it has been around 16 lumens/watt. Here's a table with different types of light efficiencies. http://www.mge.com/home/appliances/lighting/comparison.htm Here's a site that says why LEDs are good for special apps like flashlights. http://members.misty.com/don/lede.html John Courter "Husar, Charlie" <hu… [at] bah.com> wrote: Not thinking about making the color softer, John. Your point is understood. It's the whole idea behind how LEDs work. Quantum states and all that good stuff. I was just wonderering how brash the light from the white LED sources is. I assume the WHITE LEDs are a mix of many monochromatic LEDs of different colors. If that is the case, and the current could be controlled to each monochrome LED separately, then indeed we could adjust the hue. Cheers Charlie --------------------------------- From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of John Courter Sent: Thursday, January 18, 2007 12:39 PM To: Ca… [at] yahoogroups.com Subject: Re: [Cal_Boats] LED for running/navigation lights Maybe I am mis-understanding what you're trying to do, but if you're trying to make the color softer on LEDs by varying the current, it won't work. LEDs will get dimmer but the frequency (color) of the light will not vary. John Courter ----- Original Message ---- From: "Husar, Charlie" <hu… [at] bah.com> To: Ca… [at] yahoogroups.com Sent: Thursday, January 18, 2007 8:08:11 AM Subject: RE: [Cal_Boats] LED for running/navigation lights I was wondering how "natural" the light is from these "super bright" LEDs. I do know that I hate the light from those high tech car headlights, and also am not partial to most neon light. I guess I am am more into the yellower light from most light bulbs. I suppose a small switching regulator could be placed in the battery hole on these babies, or else a pad resistor would be required for 12VDC hook-up. Problem with pad resistor is that intensity would vary when alternator is on. Cheers Charlie --------------------------------- From: Cal_Boats@yahoogrou ps.com [mailto:Cal_ Boats@yahoogroup s.com] On Behalf Of Bruce Stirling Sent: Thursday, January 18, 2007 10:49 AM To: Cal_Boats@yahoogrou ps.com Subject: RE: [Cal_Boats] LED for running/navigation lights Costco had a deal just before Christmas on a package of three LED lights, each having five (5) "super bright" white LEDs per light. All for about $20.00. They are battery operated, on-off switch, and the light head swivels and pivots for "ideal light positions." Three AAA batteries per light. They are called "LUMEN" and they are warrantied for two years. They attach with either velcro or a screw. I posted a photo online here: http://www.stirling law.com/cal28/ lumen.jpg http://www.stirling law.com/cal28/ lumen2.jpg {give me a minute to post them up there} From: "edwardperrow" <edwardperrow@ yahoo.com> To: <Cal_Boats@yahoogrou ps.com> Sent: Tuesday, January 16, 2007 10:38 AM Subject: [Cal_Boats] LED for running/navigation lights >I am incrementally replacing my cabin light bulbs with LED clusters and > would like to replace my navigation light bults with LEDs AND HAVE > SEVERAL QUESTIONS; (i) are there USCG issues, (ii) any suggestions for > sources and (iii) what are others experience with the nav/running light > options? > > Thanks and fair winds, > > Ed Perrow > CAL 25-2, Spirit > Lake Lanier, GA > > > > > Yahoo! Groups Links > > > > > --------------------------------- Want to start your own business? Learn how on Yahoo! Small Business. --------------------------------- Bored stiff? Loosen up... Download and play hundreds of games for free on Yahoo! Games. --------------------------------- Want to start your own business? Learn how on Yahoo! Small Business.

These are the 1 watt bulbs, 3 watt are also available @ 120+ lumens. LUXART® Accent Light SPECIFICATIONS PART NO EMITTING COLOR CURRENT DRAW If(ma) @ 12VDC ** TYPICAL LUMINOUS FLUX UNIT: Lumens DOMINANT WAVELENGTH UNIT: nm (CCT for White) Viewing Angle Unit:deg SBL Brand Aluminum Luxart-W White 130 134 45 5500K 160 Luxart-WW Warm White -- 133 20 3300K 160 Luxart-B Blue 148 130 16 470 160 Luxart-RB Royal Blue 151 136 220mW* 440 160 Luxart-G Green 143 139 53 530 160 Luxart-C Cyan (Aqua) 140 140 45 505 160 Luxart-R Red 131 147 44 627 160 Luxart-OR Orange/Red 120 -- 42 615 160 Luxart-A Amber 127 142 42 595 160 * Royal Blue is binned by radiometric power and peak wavelength rather than photometric lumens and dominate wavelength ** For the SBL brand, the current will decrease as the voltage increases. For the Aluminum units, the current will increase as the voltage increases. As an example: the SLB Blue will draw 120ma at 14.5 Volts, the Aluminum Blue will draw 166ma at 14.5 Volts The Luxeon LED Driver circuit in the SBL Brand units keep the power consumption constant over the entire operating range of 10~14.5VDC From: Ca… [at] yahoogroups.com on behalf of John Courter Sent: Fri 1/19/2007 8:43 AM To: Ca… [at] yahoogroups.com Subject: RE: [Cal_Boats] LED for running/navigation lights The 16 lumens/watt that I remember is from a year or so ago, the bottom website in my last post even says that they're now up in that range, I just wasn't reading that part carefully. We're just talking about white here. John Courter ti… [at] ch2m.com wrote: The Luxeon LEDs are around 40-54 lumens per watt, depending on the color, as I recall From: Ca… [at] yahoogroups.com on behalf of John Courter Sent: Thu 1/18/2007 8:32 PM To: Ca… [at] yahoogroups.com Subject: RE: [Cal_Boats] LED for running/navigation lights This wikipedia website says the same thing that my electronics goto guy says, which is that most are blue LEDs, with a phosphor in front. Scroll down about a 1/3 of the way and you'll see the spectrum where the spike is the blue LED and the rest of the light frequencies are due to the phosphor. http://en.wikipedia.org/wiki/LED <http://en.wikipedia.org/wiki/LED> Here's a tidbit. Did you know that the efficiency (lumens/watt) of white LEDs is just in the last year becoming as good or slightly better than an incandescant bulb? For general lighting you get much more light from a fluorescent than an LED for the same amount of battery used up. White LEDs have been getting better almost every year, but it has been around 16 lumens/watt. Here's a table with different types of light efficiencies. http://www.mge.com/home/appliances/lighting/comparison.htm <http://www.mge.com/home/appliances/lighting/comparison.htm> Here's a site that says why LEDs are good for special apps like flashlights. http://members.misty.com/don/lede.html <http://members.misty.com/don/lede.html> John Courter "Husar, Charlie" <hu… [at] bah.com> wrote: Not thinking about making the color softer, John. Your point is understood. It's the whole idea behind how LEDs work. Quantum states and all that good stuff. I was just wonderering how brash the light from the white LED sources is. I assume the WHITE LEDs are a mix of many monochromatic LEDs of different colors. If that is the case, and the current could be controlled to each monochrome LED separately, then indeed we could adjust the hue. Cheers Charlie From: Ca… [at] yahoogroups.com [mailto:Ca… [at] yahoogroups.com] On Behalf Of John Courter Sent: Thursday, January 18, 2007 12:39 PM To: Ca… [at] yahoogroups.com Subject: Re: [Cal_Boats] LED for running/navigation lights Maybe I am mis-understanding what you're trying to do, but if you're trying to make the color softer on LEDs by varying the current, it won't work. LEDs will get dimmer but the frequency (color) of the light will not vary. John Courter ----- Original Message ---- From: "Husar, Charlie" <hu… [at] bah.com> To: Ca… [at] yahoogroups.com Sent: Thursday, January 18, 2007 8:08:11 AM Subject: RE: [Cal_Boats] LED for running/navigation lights I was wondering how "natural" the light is from these "super bright" LEDs. I do know that I hate the light from those high tech car headlights, and also am not partial to most neon light. I guess I am am more into the yellower light from most light bulbs. I suppose a small switching regulator could be placed in the battery hole on these babies, or else a pad resistor would be required for 12VDC hook-up. Problem with pad resistor is that intensity would vary when alternator is on. Cheers Charlie From: Cal_Boats@yahoogrou ps.com [mailto:Cal_ Boats@yahoogroup s.com] On Behalf Of Bruce Stirling Sent: Thursday, January 18, 2007 10:49 AM To: Cal_Boats@yahoogrou ps.com Subject: RE: [Cal_Boats] LED for running/navigation lights Costco had a deal just before Christmas on a package of three LED lights, each having five (5) "super bright" white LEDs per light. All for about $20.00. They are battery operated, on-off switch, and the light head swivels and pivots for "ideal light positions." Three AAA batteries per light. They are called "LUMEN" and they are warrantied for two years. They attach with either velcro or a screw. I posted a photo online here: http://www.stirling law.com/cal28/ lumen.jpg <http://www.stirlinglaw.com/cal28/lumen.jpg> http://www.stirling law.com/cal28/ lumen2.jpg <http://www.stirlinglaw.com/cal28/lumen2.jpg> {give me a minute to post them up there} ----- Original Message ----- From: "edwardperrow" <edwardperrow@ yahoo.com <mailto:edwardperrow%40yahoo.com> > To: <Cal_Boats@yahoogrou ps.com <mailto:Cal_Boats%40yahoogroups.com> > Sent: Tuesday, January 16, 2007 10:38 AM Subject: [Cal_Boats] LED for running/navigation lights >I am incrementally replacing my cabin light bulbs with LED clusters and > would like to replace my navigation light bults with LEDs AND HAVE > SEVERAL QUESTIONS; (i) are there USCG issues, (ii) any suggestions for > sources and (iii) what are others experience with the nav/running light > options? > > Thanks and fair winds, > > Ed Perrow > CAL 25-2, Spirit > Lake Lanier, GA > > > > > Yahoo! Groups Links > > > > > Want to start your own business? Learn how on Yahoo! Small Business. <http://us.rd.yahoo.com/evt=41244/*http://smallbusiness.yahoo.com/r-index> Bored stiff? <http://us.rd.yahoo.com/evt=49935/*http://games.yahoo.com> Loosen up... Download and play hundreds of games for free <http://us.rd.yahoo.com/evt=49935/*http://games.yahoo.com> on Yahoo! Games. Want to start your own business? Learn how on Yahoo! Small Business. <http://us.rd.yahoo.com/evt=41244/*http://smallbusiness.yahoo.com/r-index>