I'm a first time grower. I used to have my plants growing under Two 120W ecolight (made for growing plants with blue coating). After reading up on lights i changed to CFL's when my plants were 14in. Over night my plants got droopy, yellow leaves, and the stems turned purple. I transplated into bigger pots and it still looked real bad. So i put the old ecolights back in and over night they look good again and one is a flowering female already. I thought it was weird that the lights made a difference.