Hello to all first off. This is my first post other than my introduction on the "welcome" page and it contains some opening questions on building a grow box. Here's a bit of info first of all on what I plan on doing and any input will be greatly appreciated... I am planning on building a grow box with the following dimensions: 2' 6"w x 2'd x (either 4' or 5'h). I guess that is technically my first set of questions; 1. How tall should I build it and do these dimensions sound ok? Secondly, I am planning on using CFL's (wish I could use HPS & MH but the size of the box as well as $ are an issue) which I have read will work. I purchased 8 100w CFL's (n:vision brand from Home Depot), now here's the thing... n:vision make 3 different spectrum CFL; soft white, bright white & day light. I bought 4 of the soft white and 4 of the day light thinking that these would simulate the spectrum of HPS and MH the best. 2.Was this a correct assumption? 3.If not which ones should I go with? The day light bulbs actually use 27w and put out 1400 lumens each and the soft white use 23w and put out 1600 lumens each just fyi. I will be painting the inside of the box white. 4.Should I also use mylar? Or will the white paint be enough for what I am planning? I'm pretty sure I have enough light (maybe too much?) for two plants and so here are my next set of questions: Ventilation.... I plan on purchasing a computer cooling fan to be used as an exhaust fan on the top of the box with 3 fresh air holes close to the bottom of the box. One on each side and one on the back. 5.Are 3 fresh air holes enough or too much? Is one exhaust fan enough for a box this size? What size fan(s) should I get? And finally... how should I wire the fan(s) to run 24 hours? SOOOO... that is pretty much it for now. I have many other questions but will ask those when the time is right. Thanks in advance!