To start with they are in 2.5 gallon buckets in a 4'x4' room, the canopy is currently 6".

Growing space left is 36" to 40" hight wise, temps are running at 70 to 75 degrees at 36" up in box, light is currently at 23" above the canopy for radiated heat reasons and even light distibution over canopy.

After writing this I am starting to see your point. I have a hell of a lot of room!
I am just worried because everything I read says 4 week veg. cycles.
Jerry Garcia 2007 Reviewed by Jerry Garcia 2007 on . day one High people, OK to start off I have just placed my White Widow seeds in paper towels and moistend. This is my first grow using this box below and seeds from a bank, and I am looking foward to this experiance. I have done my reserch and this is the set up. I have made a grow box out of white panel boards and 2x4s. size 4'x4' x 7 feet high total 16 sq ft. Inside of this I have a 600w digital ballast that will take mh and hps bulbs. I sealed all cracks with aluminum tape. I made 4 vent holes Rating: 5