How can I salvage LEDs that are welded to metal heat sink? Answered
I have a light fixture that used to be an street lamp, and the 350mA 240V constant current ballast failed. The LEDs appear to be welded directly to thin insulated metal sheets which as somehow bonded to the large metal heatsinks. I think the LEDs are Cree XR-C's, and there are 6 of them on each module, and there are I think 6 modules in total.
I have some ideas, but how would I get the LEDs off the modules, if they are even worth saving at all? They are according to CREE they produce 78lm @ 2W, and are a pathetic 39 lm/watt. If I can get them off the aluminum heatsink easily enough, I might be able to use them for prototyping purposes so I do not kill $$$ XM-L LEDs, and do not kill 3mm white LEDs either, since I tend to kill those quite fast too by overdriving them or too much voltage.
It is amazing to think how far technology has come, that XML led sitting next to the module outputs more than double the light, with less 20% less power!!! I have always thought that LED technology still has a WAY to go before becoming practical enough to justify the higher costs, but if a company has installed this Piece of Sh*t light fixture back when these LEDs were 'state of the art' than I wonder when metal halides go obsolete!