Hear is a good place to start http://boards.cannabis.com/indoor-li...-lighting.html

Oh and t5 are really efficient source for vegging clones and seedlings for sure. If your about to go out and buy something look for T5HO that have four bulbs or more if your trying to buy one light only for a small number of clones/seedlings. In a pinch you can swing thru a big box store and buy a few cfl's that would an easy solution if your living in an area that doesn't sell T5HO. I use a 400w and am a dirt farmer as well, I would love to see some pics of the box or room if you have any.