Grower's Choice ROI-E720 Review
The total light output of the fixture is an outstanding 1870-1924 umol/s with a reported efficacy of 2.6 umol/J. The light will flower a 4' x 4' area at very high intensity or 5' x 5' area at moderate to high intensity. Expect to use this light at around 6' to 24' inches above your plants depending on the footprint you want to cover and the light intensity you want to deliver to your plants.
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