Hey guys, ive been lurkin around on here and some other sites and finally decided to give it a go, but just had a question or two before i build my box. dimensions will be 21"x21"x21". i will be using cfl's for my grow, four 23w 6500K for veg and 2700K for flowering. now first question im only doing two plants, is this to much light? and second question will two pc fans(one intake one exhaust) be enough to keep temps down and circulate enough air? thanks for any help.