The PAR of the sun (photosynthetic active radiation)
Urban Garden Center One Stop Shopping
June 3, 2014
Worlds most effecient, productive grow light. Quantum Flux the photosynthetic LED canon
June 3, 2014
Clear sunny day at 1pm in the sunny NW. The photosynthetic active radiation of our sun, tested with a quantum flux apogee UMOL meter.
