> I am testing Luxeon K2 1500 ma 3,6 v led no matter what I do
> it gets real hot 50 degree C in 30 minutes this is what I do.

I did some testing on Luxeon V starts, with built in heatsink. They  
get HOT. 15 mins, solder starts smoking. Heatink with grooves,  
roughly Lucozade Cap (sorry been down pub) sized keeps them 'safe'.  
Cant be too far off what a K2 uses.
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist