I'm going to use a cool tube fixture and hood w/fan for heat, and the height is actually 62" if I lower the shelf the plants are on to just off the floor
That gives me about 48" of headroom, and most plants don't get over about 36" right?
Also, it's a dim-able digital ballast because I'm enlarging my space later this yr (maybe after current grow) to a 4' x 4' x 6' + space, and I have a 24" heat insulator pad/blanket to place above the light as a heat shield as it is a sheetrock enclosure