for the first 2 days they where grown by a regular light bulb then after that it stayed on with the addition of an 40w 4000k florescent tube, then just yesterday i bought four cfls with 5000k temp range with a combined 4800 lumans. the day before i bought the new lights i planted some of my germanated seeds in the the cups and they have allready started to grow better than the first set... most likeley due to the better lights. but are my first set going to make it being so lanky???They look very stretched. They are trying to reach for the light and it is too far away. Are you using flourescents?