Originally Posted by snaggy

ok.
I understand that you want the bulb as close as possible to the plant for maximum growth, etc.

But does lumens not come into play also?

My question is........
If a 43 watt cfl is 1 inch away form a plant.
And a 250 watt cfl is 6 inches from plant.

Would the performance be approximately the same for each plant?
or
Do you still need the 250watt cfl 1 inch from plant to perform the same?