I vegged 4 plants under one 4' shoplight fixture. (I also had a couple of CFLS in the end when they were bigger). I am flowering now with 8 CFLS, and the fixture....only two plants however,cause the other two were males...I'm still dreaming up ways to have an HPS instead. Only for two piddly little plants, certainly not nine (you have to get the floros so CLOSE, if you want any growth)....Garden Knowm tells no lies....As for your question, I believe you can get to sprout under the current lights no problem. PS. I used Daylight EcoLUX Light tubes and liked them. Good luck, Bree.