i use 4 48'' GE daylight bulbs.(3150lumens ea, 40w ea, 6500k. these bulbs kick ass! i got 2 inches of growth yestrday, 3/4 inch last night.

read some of my threads and check out my setup. It morks miracles for me.

day16 of veg, 10-15 inches tall, 5-8 nodes.

hope this helps, check "indor growing" forums, thats where my threads are.

love, brooke