So you have 9 square feet.
9 x 50w = 450 Watts minimum. You want to add at least 110 watts.
My advice is, replace it all with a 600W HPS, or get another 150 Watt light. The 600 would be more efficient than running 3 ballasts anyway. You'll get way more light for about the same electricity.
psteve Reviewed by psteve on . could someone explain the light cycle to me please ive had my clones i bought from the club for about a day now. i have 2 150 watt plant lights and two 15 watt florescent lights in a closet. ive heard that you keep the light on 24hours a day until it gets tall enough then you go to a 12/12 cycle when you want to flower it. is that true? im also new to growing i have peters food diluted with water, and some doom lite lime. One of the senor members told me i should put a bag over the plants so they wont wither, but how long to i keep the bags Rating: 5