Quote Originally Posted by Jdog7000
OK, I go by a simple rule.
50 watts per sq. foot at least.
So if you have a 400 watt light.
Thats a 2 by 2 foot area to grow in.
As far as lumens go, I think 2,000 is the bare minimum you would want per square foot. 3,000 - 5,000 lumens per square foot is better. The higher the lumens the better the grow, theoretically speaking. But I think for indoor growing 4,000 - 5,000 per square foot is ideal.

BTW, I can't quite remember if it is square foot or meter...

:smokin:
Binzhoubum Reviewed by Binzhoubum on . lumens help! How many lumens are needed for clones and two mothers Rating: 5