translating watts to lumens/foot candles
Hi. I have four 24" two-tube fluorescent fixtures on my tiny light stands. The tubes are 18 watts; how many foot candles does this translate to, or is there somewhere I can go?
I'm growing African Violets and their cousins, and some small orchids, and it would be useful to know how high up to hang the lights.
Thanks so much for any help you can give.