After having used Chinese LED drivers with Chinese 3-watt stars for a while now, I'm now trying AC power adapters that convert 120/240 to 12vdc @ 600ma, in order to driver four 3-watt stars in series. Now, one of the stars always seems to die after about 5 to 7 days of operation. They are mounted on an aluminum plate which only reaches 115 F, which is actually lower temp than the LED drivers would reach.
Is it possible that the AC adapters are introducing spikes into the supply?
Is it possible that the AC adapters are introducing spikes into the supply?