hi guys just started some seeds in a propagator and they come though. but when i went to get my nebular light 125w the tubes are broken. I've got a CFL but its a 300w do you think it would be to much light for the seedlings. and how long should i keep the seedlings in the propagator for. they about 3 days old starting to stretch a bit as I've given them no light. many thanks for any reply's.