+1. Unless you really know what you're doing, LEDs in parallel is a bad idea. A slight forward voltage or thermal mismatch causes one LED to dominate the curren

+1. Unless you really know what you're doing, LEDs in parallel is a bad idea. A slight forward voltage or thermal mismatch causes one LED to dominate the current consumption until it fries. Then the cycle repeats for the next LED. When I was an ignorant child I fried $60 UV LEDs, but it was a good lesson... But at least the article mentioned it, > It's important that there are n LEDs (connected in series) in each of the m parallel branches of the circuit and that the LEDs all have the same Vled and Iled. Otherwise, all bets are off.