Plant photosynthesis is performed during the day/light on periods. This routine is done throughout the plant's life cycle each day from 12 to 18 hours. During the growth period, plants do not absorb just any light source but rather very specific array of spectrums for optimal growth. This is why the engineers at E-MAX have designed the SUNRAY LUX series. This product has been field tested for positive plant reaction and vigorous growth. During our field test, we found that plants using the SUNRAY LUX had an earlier start in flowering, denser and heavier results than our experiments with regular HPS.