Know a thng or two about cfl's. If you are going for side lights get something 42 watts and lower as to not increase the heat in a major way. 6500k or cool white cfls are for veg and 2700k or warm white are used for flower. Personally I veg in cfl and flower with hps. Did my first couple of grows with cfl only. It important to have a mix of 2700 and 6500k cfl's for optimum growth. Mimics the sun's light spectrum better that way. I have 2/3rd's 6500k for veg ( say 16 out of the 24) and then go 2/3rds 2700k cfl's for flower. 24 is a lot of bulbs. Your grow area must be larger than mine.