I built a box out of Plywood, that is 2' x3' by 4' High and used a number of floodlight type fixtures mounted on movable panels for holding Cree LED bulbs, I am using it for peppers, baby bok choi, herbs and lettuces and tomato seedlings now.
Put a vent hole in and epoxied a bath exhaust fan attachment (plastic that allows attaching 4 inch vent to it) with a computer fan. Saw that would not work with smelly plants so used an extra bathroom fan and built a frame to hold activated charcoal in it and plugged it right into the plastic adapter.
Decided I want MORE powerful lighting, so I bought a commercial 3 ft T-5 fixture, and an Apollo 180 W UFO. (109W true) for the big day. I have some pics of the build so I may do a blog but I am a full time student right now. (And my brain isn't up to the level I want right now.)
Cheers, OEC