Without alot of lumens your plants will grow slow and your buds will be very thin . The more bright light in the red and blue spectrum the better. If your using standard fluorescent lamps you will need 6 to 8 lamps of a variety of specrums and make sure you have a reflector behind the bulbs. I would suggest going to home depot and getting a 100w HPS they work excellent withot alot of heat or cost.