12V come directly from a commercial switching power source with 2.5 amps capacity (Can this be blamed?).
Each led module consumes 40mA, and I have 42 modules.
Thanks fungus. In most of the cases a pair of leds dies, and the other 3 survive.
You are right, I was a victim of "EL CHEAPO" Leds Made in China.Problem is....everything I can buy arround here are from the same origin.