I made a grow box of very similar design, then I came to this site and found this thread, glad to see that the idea actually works good

Mine has 5 - 60watt(2600lumin) CFLs and 1 - 59watt(2200lumin) CFL (one outlet is too close too fan for another 60watt) (15200 lumin), a kiddie fan in the top and slit vents (with shades) in the bottom. It also has a view window to check on the thermometer/RH% Meter inside. I taped a powerbar onto the side for the timer/etc... It's also set up so I can just use the top half when the plants are small and I butchered/glued a lid onto the top half so it locks onto the bottom half.

It started out as basically a hobby project and kinda exploded







I had it in my bedroom for a bit, but it was way too bright. The lights shine through the plastic in places, so i gotta tape over some places. It may look kinda ghetto, but it seems to work pretty good.