I've been lurking for almost a year now, and decided to join up a little while ago.
I'll introduce myself in the appropriate location in a while.
However, in the mean time, I'll just say that I've got some ocean sailboating experience (i.e., where there are limited electrical resources).
So, here's what I like in the way of LEDs.
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I use Sensibulbs by SCAD Technology LLC
Basically a bunch of techno-heads that have designed a very wierd looking, but great LED unit.
http://www.scadtech.com/home
Yes, they are initially expensive, however, in the long run, the cost can be reduced over the approximate 50,000 hours of operation and IMHO worth every penny of their price. So, it's only really a sticker shock, buy one, try it out and then if you agree with me that it's the best there is, then you can get some more. Plus I've got a slightly lower price source at the end of this message.
Here are some web stores that sell them at the regular $40 each.
http://www.semarine....&cat=217&page=1
http://www.sailorsso...ils&Item=SEN10W
If you're existing light housing doesn't have the "G4" socket or you don't want to change out the light housing to that kind of socket, there is an adapter...
http://www.navstore....il.aspx?ID=1806
And, if they are too bright, SCAD also makes a dimmer, however, it's about the same price as the Sensibulb.
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Here's a web link that has photos showing the light output of various led lights, almost a scientific study, trying to keep the variables of the test to a minimum.
http://forums.sbo.sa...ad.php?t=103101
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And now, here's a guy on Ebay that sells the Sensibulbs at $25 each.
I've purchased from him, however, other than that, I have no affiliation with him.
http://cgi.ebay.com/...essoriesQ5fGear
Once the Ebay listing is no longer functioning you can just Ebay search on "Sensibulb" or search on his Ebay seller's name, which is "vacadelsol".
He's in Watsonville, west of Salinas.
He's a little slow in shipping them out, as he may only ship on a certain day of the week.
As you've hopefully found out by reading the info at the links above, there are two types of Sensibulbs, the older style that are warmer in color (these are what Vacadelsol is selling and the ones I like... very much like an incandescent light) and the newer version that some guys don't like as they are "cooler or bluer light", much like a lot of other LEDs.
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I hope this has been helpful (and that my web links work properly, every forum is different it seems).
I hope I didn't go over board in this, my first message here.
What I hope I've done is answer any questions that anyone might have, ahead of time.
Enjoy.
Alley-Kat