I'm converting a van into a RV. If you're really bored and want to kill some time you can see it at this link (warning it's very long).
I need some exterior lighting fixtures. Can't find anything just like I want so I'm going to make my own. The initial plan is to use a 2" PVC end cap to hold the LEDs. I'll drill a series of holes through the cap side and place the LEDs in the holes. Put the electronics inside the cap and then seal the whole thing against the weather. Feed it 12 volt from the "house" batteries.
I'll be using thru-hole type LEDs and want to use the brightest one's I can find. I've read "Don's 'LEDs with Punch!'" and other threads on the subject. The van uses 4x6 volt golf cart batteries (260 lbs) so I'm not that worried about efficiency.
I've looked at the brightest LEDs carried by Digi-key and Mouser and other retailers. But the brightest one's I found are from a ebay seller called Topbright. I'd provide a link but I don't want anyone to think this is some kind of a stealth ad, cause it's not.
They claim "10mm 40° 1W Watt White LED 300mA 380,000mcd". The thing is the "380,000mcd" figure seems so far ahead of what the legitimate sellers are carrying my radar goes off.
Has anyone had experience with these? When something sounds to good to be true on Ebay, it is. Even if the specs are true I'm curious how a thru-hole LED would dissipate the heat. I know from reading, just reading since I'm a newbie on this subject, the 1 watt surface mount LEDs require a good heat sink.
That's my first questions. Thanks for your time.
PS. Here's a Youtube of the electric sofa-bed I built for the van/RV: Youtube