to germinate....you do not need any light! it happens in darkness. If you mean seedling stage, go with the CFL for 7-10 days, gives heat, easy to adjust, less energy consumption. But mind!!! for CFL to hit the sweet spot in vegetative stage you need to be careful at the amount of lumens, not the force of it. It has to be 6500k Lumens (bright white light) for vegetation, the ones 2700k (worm yellow) are for flowering