Grow Light distance

more power while maintaing similar PPFD at canopy will provide more light to lower areas --- more sphotons bouncing off walls at more obstuse angels. basica geometry at play... Now, this will technically increase the light hitting lower areas but also much less efficient use of watts -- way more lost to absorption and each doubling of distance traveled decreases intensity to 1/4th of what it was half way back to the light (inverse sqaure law applies.) e.g. if you find the optimal point for PPFD is 18" away... then you raise light 24" that is a 1.33 incremental change (6/18 = .33). 1 / 1.33^2 *100% = 56.5% of previous intensity at 18" and specifically measuring within same area of canopy as before... just from a 6" increase in distance. going other way is just as sdastic.. 6" less is 1/.66^2 *100 = 230% increase in intensity lowering from 18" to 12".... But, a law of thermodynamics tells us no energy is lost or gained... so, those phtons are still there.. they are just spread out more... more bounces off a 90% reflective wall means more photons that will never hit the plant (not technically "lost"). More light will hit at very obtuse angels and then hit the gound etc etc... scatted all ove the place -- this is why it should increase light to lower areas.. is it worth it? i don't know... at some point the cost won't justify it.