Actually thats not true. You can use CFL's for veg and flower and if you use the right spec light and its positioned around the plant properly you will get a good yeild. Obviously, a HID (MH or HPS/LPS) will always work better.
LIP Reviewed by LIP on . 30W CFL i dont have access to large cfl, so i thought of using 6 30w CFL (150W incandecent equivalent) (Warm white, 2700k, 1700 lumens), would 6 of them be ok for flowering 2 plant in a 5feet sqr? Rating: 5