yeah, I was thinking 400 would be about right, just will have to deal with the heat ... I have top-mounted exhaust fan, and floor-level intakes, but heat isnt an issue with my flourescents, I will need a better fan with the HPS400 .... regarding an earlier question, I had good results with 6x40watt tubes, potency-wise, but no large yields ... plus, now I am at 8 tubes, and weight of the light unit is a pain in the ass, so HPS400 looking better every day ... thanx for info ... :smokin:

newest cabinet, just finished it a few days ago ... 2' x 4' x 6.5'
eight 4' 40W 6 blue, 2 red now
will flower w/ 6 red, 2 blue
may buy HPS400

http://i15.photobucket.com/albums/a3...m/935e1204.jpg