should i water really good and will they be ok?
too much water is bad too IMO.....Also how close are these lights going to be when you leave because if they are too close, whatever does sprout might end up getting burned by the light, as they seem to be a bit lanky when cannabis first sprouts.

Also I wouldn't really worry about only having 3 CFL on them for now as that should be plenty efficient for your sprouts.