Grow Light High

How high should I mount my T5 grow light?
I've have a Hydrofarm T5 Grow light rated at 454 watts with a maximum output of about 40,000 lumen. I want to achieve 10,000 lumen for my garden. How high should I hang the light fixture above the plants? I've had a hard time finding a lumen fall-off chart for a 4 foot - 8 lamp system. Can anyone help me out?
Around 4' above the plants.
Central High educator leaves with honors
Trends and culture tend to change pretty quickly, and in a highschool it can happen in the blink of an eye.
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LED GROW LIGHTS THE COST

US $40.00









