Are your shop lights 2 or 4 bulb? Fluorescent lights can do well with herbs and greens, but for fruiting vegetables, you really need some more intense light. WIth the rig you�re planning the reflective foil will increase the available light. THe more the better. I use a 4 bulb 48" T8 fixture over my raft system. I can adjust the height of the fixture with chains. It works well with the lettuce and cilantro I am growing. A fan is necessary as when the plant is under light since it is transpiring. Circulating air enhances transpiration and consequently increases nutrient uptake. I turn my fans off when the lights are off as the stomata close an no transpiration occurs. For veggies, consider picking up metal halide, high pressure sodium or LED (which I use for tomatoes and peppers and love). Hope this helps.

Michael
thank you the info! I have 2 bulb lights. I was hoping I could get by with 1 set per shelf at least till payday when I could buy a few more. I want to get as much planted indoors so I do not have to spend so much on plants this year.
Wondered if I could move the lights side to side every 12 hours 1 set over each shelf or do they have to have 16 hours of light?

Kim