Loco1074answered grow question 4 years ago Truth is fellow grower is that i use 4ft t5 light fixtures my first grow before switching to LED and i can tell you most cfl bulbs are 50-55 watts per bulb. One dual light fixture can see 2 plants thru entire life cycle but the low intensity lighting will affect yield. In reality i ended up getting 3 dual cfl fixtures bc 100 watts wasnt doing it. After jumping the intensity to 300 watts the plants took off. Have a grow diary using the 3 cfl fixtures. Hope this helps brother.