Depends on their wattage and lumen output. Aim more for, how many lumens do I need ? Around 11,000 so you need to get as many bulbs that reach that figure ( and maybe a couple extra) doesnt hurt.

Charbud
Charbud Reviewed by Charbud on . How many CFL'S do i need? I have one afgan kush plant growing in a closet how many CFL's should i use? Rating: 5