build your own using CREE's Leds 3w each. Use royal blues, reds, and whites. I think white is around 6500k the blues are 420mn and reds are 520 mn something like that. Then add 60 degree optics this will intensify the light. 48 of these 3w leds equals around 400-500 MH. if your really interested in growing with LEDS look in the salt water forums on LED builds they are alot more advanced in those forums on growing with LEDS. They have done many many PAR testing using CREE led's and show its just as good if not better then a MH on penetrating dept and par ratings. I just built a LED fixture for my saltwater fish tank to replace my 150 Metal halide over it. All you need is the LEDS, heatsink and DRiver. Then wire it + to - . Serious man don't waste your money on these cheap a$$ LED's their the whole reason LEDS have such a bad rep in growing. If you spend the money and get the best LEDs it will work.