well my last thought was to stick 4x32watt (which equal 150w, normal bulb, i believe). But i only want to grow the one plant, so i thought these might do?? what do people think?? Also wot is this crap about warm light, day light, red spectrum, blue spectrum etc etc about?? please explain!! Also wot do ballasts do and are they needed?? cheers guy/gals, all this advice is fantastic and valued by me, thanks!! :rasta: