man,my last grow cost me 300e in 2,5 months.never using 400w in my house again.it was first bad mistake what i ever made as a personal grower.yeah 400w bulb+plus ballast+plus ventilators x3 40w each+i had the small youk behind the timer what was spinning my plants 180* in every 2 hours(24w)..and thats just the basicc.never mind if you go hydro...thats whgy i stick now with CFL-s and go LST..


and if ya wanna use HID or SOD in a growbox 4f in hights then good luck..try da keep temp right and try not da burn your plants...
i think tht in your case CFL is the best.;..
or decent 90w UFO surrounded with 20-23w CFL 2700k and 5600k. that would work out as...
LED 90w
6x20w CFL 120w
3x ventilation 30w max(small room) thats what i would do-but it all depends how much ya wanna or can spend..

so anyways keep us updated how your geting on and all that..