I've got them under four, 4ft. 40watt U.V. lights. I read the growing guide. Thanks alot...I made a copy of it. I'm still not quite sure which ones are male. I think most of them are female because they are looking like seed pods more and more as the days go by with the shorter lite hours. Two of them are quite abit darker in color and aren't looking as much like seed pods...more like flowers without the pods opening up. I've taken pictures of them and am going to try and submit them in this thread. Thanks for help Patti