But I don't know a whole lot about them.
I've been looking on this site:
So obviously it is expensive. I would use them to light my growrack, which has 3 shelves, each 4 feet by 18 inches. Right now, each level has 2 fixtures, each with 2 40 watt t12's. They do work ok, but I have to keep the lights fairly close to plants, and they generate a lot of heat (there are 6 fixtures total in there). The whole rack is contained to control humidity, as I live in the desert and room humidity hovers around 15%.
I am not able to figure out how many or what type of fixture to use. I see a 3 light model and a 5 light model. Would I need two of those per level like I have now - which would cost an absolute fortune, or would 1 cut it? Also - how much humidity can they take. Right now it runs 65-85% in there. My flourescent fixtures so far haven't minded it - but they are very cheap so easy to replace.
If anyone has any tips or some informations let me know!