Thanks those semi helped but was good knowledge to take in. Now the amount of space I have to work with in my boiler room is 24 1/2" long X 23" wide X 3 1/2 feet tall so I hope that helps with those mesurements on what the final box demensions I have to work with. The box is going inbetween our boiler and the central air unit. So I also found some flat white paint in the basement. Now will the white paint help absorb some of the heat along with making the light reflect evenly? Also your train wreck grow was amazing. How was the smoke from it?