Thanks for the info...my tubes I believe are the T12 types so by your description are the weakest. So the wattage doesn't count? How many footcandles would 2, 48inch T12 put out? Would you think I should shop around for T8 tubes? My phals now get a few hours of sun each day but in the winter, I will be depending more on the tubes for the light source for the plants. Have you ever seen grow lights that are shaped light spot lights? I had once & thought I could augment lighting with one or two of the spotlights since going to 4 tubes would be nice but probably won't happen in the forseeable future.
regards, mary
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