You can get away with using the 20W bulb for a couple weeks before you'll need a lot more.
stickygreenlightsabr Reviewed by stickygreenlightsabr on . Just one light. I've got a desk lamp with a 20w CFL, some dirt, and some seeds. Will they even try to grow with just one CFL, or do I really need to invest so much money into lighting before I know if my seeds are dead? Rating: 5