Indoor Grow Lights: Two new and better choices, T8 and T5 bulbs, are now available. Old-line T12 fluorescent bulbs are still cheap and easy to find, but T8 bulbs, are up to 40 percent more efficient. Plants get plenty of light when grown within 2 inches beneath T8 bulbs.
After a few weeks I realized the natural light wasn't cutting it. I made these simple shelves out of half inch maple (the same stuff the planter boxes are made out of). I mounted a 2 bulb (T8) fluorescent fixture under each and did my best to hide the cords. Hopefully this will be enough light for them.