Kiki007
Well-Known Member
Rule of squares comes into play. You want to keep your lumen level over 5,000 for ideal growth.
145,000 lumens measured at 6.8" is only 36,250 lumens at 13.6".
Figure a 6x6 space is going to be at least 38" from the bulb to the edge of the canopy. At that distance you dip under 5,000 lumens to 4,645 lumens and less than 1/30th of the advertised energy. A 5x5 footprint will keep the bulb closer to the canopy edge and the whole thing will get enough light for healthy photosynthesis.
When you slam a few lights together the over lap does allow for more even lighting.
Nice argument SNOW - that's totally valid.... thanks for the education in lighting today!!