yo. bad news. hallogen=wprst shit ever. talkin from experience. so, any metal halide, sodium, or bulb. second, wut u talkin bout u took yer plant off to wash it??? wtf?? aeroponic system doesnt neet u to do this. and your a newbie dude, so u should really really start with soil, pretty easier, and aero is kinda for experts, u know with nutrients and everything. if u want any more info, go to overgrow.com FAQ.