heard the same but giving it a go anyway. Have a mars fc 4800 evo (480w) in the 3x3 flower tent and a fc 3000 (320w) evo in the veg room. Just finishing my last HPS run in the 5x5 tent....maybe ,,,,we see how the led's do. If no good, will revert back to MH and HPS and sell them LED's