I guess you're referring to the first pages of this thread which are now quite old and technology has changed a lot since. We ended up designing our own LED lamps using only CREE LED chips and are directly integrated on our rear light PCB - circuit board (no lamp contacts). They don't heat and there is no need to add any additional venting in the housing which must remain waterproof.that link to e bay said " page not found " Have you another link ? thank you !
I have this complete kit on my 2003 360 Spider and I absolutely love it.
Great design, excellent build quality, much brighter than stock bulbs, consumes much much less power, bulbs doesnt get hot, and being LED's this should last a long long time.
Excellent support too from the seller.