3000 lumens a square foot is for great growing, 1000 is minimal. You want to get larger wattages to get light penetration. Here is a little link on lighting:

Chapter 8 - LIGHT

What kind of grow area are you using? (closet? measurements?)
Dr.Hashman Reviewed by Dr.Hashman on . help me is a 200 watt heat lamp enough to make my babies grow?:smokin: Rating: 5