Being a plant-a-holic, I couldn't let lack of light stop me from having an indoor garden. With the help of a very handy friend (thank you Stephen Barnett!) I turned my dauntingly dark windowsill into a plant display. It was surprisingly simple (was that because Stephen did all the drilling?); perhaps a few of you with little or no natural light might give it a try.
1) Screw 2 x 4s into your window frame, giving yourself a sturdy base for the light fixtures.
2) Attach fluorescent fixtures to the wooden frame. I used double tube fixtures on top, but only had enough depth for single tube fixtures along the sides.
3) Tuck the cords up behind the reflectors, run them along the top of the window, and down the side into a power strip. (I needed an extension cord to make everything reach.) Insert bulbs (half cool white and half warm white), then plug the power strip into a timer. Set the timer for approximately 16 hours of ON time and plug the timer into the wall.
4) Hang lucite or plexiglass poles across the window. By using clear poles, you create an open display space, where nothing distracts from the plants themselves.
5) Agonize for hours (or days) over the perfect arrangement for your plants. These are primarily Rhipsalis (although there's one Ceropegia in there). Rhipsalis are epiphytic cacti and very drought tolerant (aka low maintenance). In fact I just got back from a two week vacation and everyone looks just fine!
The truth is these plants probably won't flower in the low intensity of fluorescent lights, but they DO put out new growth. I rotate them every week so each plant has time close to the gro-lights. It just goes to show you that if you really want an indoor garden...nothing can stand in your way.