Ok, its a little tentative but this PAR reading is 67 (best=68, worse=59). The reading from August is 89 so quite a drop. The plants are probably blocking light a bit but it looks like last time I wasn't running the second bank of blue lights on the LED and am now running that at 50%.
Kelvin has shifted from 6525 to 5625 degK. I guess this suggests a shift to a more reddish light but looking at the spectrum loss it looks pretty consistent across blues, greens and reds. If anything I would of said I have lost more red light so idk on sprectrum shift as lights age. Anyways got 4 bulbs sitting there for the t5ho so might start swapping them out. I think the bulbs are bout 9 months old now.
Kelvin has shifted from 6525 to 5625 degK. I guess this suggests a shift to a more reddish light but looking at the spectrum loss it looks pretty consistent across blues, greens and reds. If anything I would of said I have lost more red light so idk on sprectrum shift as lights age. Anyways got 4 bulbs sitting there for the t5ho so might start swapping them out. I think the bulbs are bout 9 months old now.