Alright, im running 8 x 3590's for the first time,
Im still sitting on the fence after my 600 watt hps growing era of 20 years.
3590s , so far my observations are faster plant healing?, i dropped the 15 kg light on a plant, split it in half, and it healed within a few hours, fucken unbelievable... but as im using potassium silicate heavily for the first time, makes results more difficult to assign to the cobs re: stem strength. i think its more the silicate than the lights?.
over all lumen/lux light meter is on par with the previous phillips pia hps (in my opinion the best hps grow bulb is Phillips)
but with a better spread of light via the 8 cobs . (pls don't tell me about par efficiency unless your a true believer in blurple)
The problem with blurple or any par light, great in theory (well?) ...but you cant get the ideal intensity most of the time from 5 watt leds or less at their spacings....
Spectrum .. is dead today ... compared to lumens per watt.
Simply because we pay for power and efficiency matters. coloured cobs are miles too far behind in efficiency and most importantly intensity , not because they couldn't make them.. but the market is limited.
Currently white leds(blues) are so efficient lumens per watt in out put per power consumption/ cost , they still beat the par targets blurple lights put out by a lot.
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Humans see Lumens /lux, but plants aren't blind to the lumen spectrum, they been around longer than humans by a long shot.
This is a drunken, stoned ramble.. lol
anyway
im worried about 3590, doesn't seem to be building my bud sites as well as the hps but early days.. 2nd - 3week after flip.