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thats what she said

your ph is too low, aim for 5.8. And next time dont put the blocks on the slabs until after you have a decent root system. In fact i'd take the slabs off if you can. the rockwool slabs wicks away the moisture from the cubes where all the roots are. So you have a dry rootzone that gets...

are those charts for version 5? what am i not understanding when people say these are better than Cree? The efficiency just isn't there

isn't there a higher driver costs running citizens over CXB because they work at higher amps? im a bit slow on the uptake

didnt realize 3000k CD bins were available. is there an email list for CREE when higher bins become available or should I just ask Jerry for the scoop? anyone have efficiency number on the 3000k CD bin?

if you have excess N in the plant there's no way of getting it out by flushing. Sure you could flush all salts out of root zone and create a gradient across the root membranes and then maybe N will decrease in plant, but at that point so will everything else that can and your plant will just be...

do you know what efficiency of each of these cobs would be? so the 1825 @ 1050ma, 1818 @ 700ma, and the 1818 @ 1050ma? do you mind explaining how you calculated said efficiency and point to any data sheets that were used. I barely wrap my head around the whole Cree COB and without supra's...

apply humid acid to reduce nutrient stress. and it might seem counterintuitive but next time you water add 1 gram per gal of epsom salts. The magnesium and sulfur will both be helpful to convert the excess free nitrates into complete proteins.

all that rain washed away their food. the roots might be too wet but if you get um growing good they won't mind. Its doesn't looks like rot problems just note def to me. I would water with some type of liquid feed (fish and kelp come to mind) and then top off the root zones with a good 1-2" of...

curious if you mind sharing yield under the CXBs when ready? difference in quality? nice looking bugs, btw.

@Ronin-indi if you wanna wire the drivers to the same pot, than you'd need a 50k pot, not 200k this explains it well: https://www.rollitup.org/t/meanwell-led-drivers-3-in-1-dimming-function.838760/

@SupraSPL Im considering purchasing 2 meanwell HLG-240h-C1050 and running 7 CXB3590s per driver based off your data sheet. Should I worry about any issues with this, since it's right on the edge? I get confused because these drivers will run the COBS at more than 1050mA when the pot is turned...

random PDF about SPD of sun throughout the day and year, might be useful to some folks http://www.q-lab.com/documents/public/cd131122-c252-4142-86ce-5ba366a12759.pdf

you have made a circular argument here, and you don't seem to realize it. Your assumption (which is different from everyone else) is PPFD if measured in the whole grow the room, the entire footprint, but everyone here is taking about PPFD ONLY for the canopy. 'So the increase in PPFD under...

It seems the real advantage to lenses and reflectors, even with a loss in total light, is better canopy penetration. Wouldn't this become more important the softer you drive the LEDs, CXB3590 driven @ 700ma only put out 4000 lumens. Maybe in instances where the LEDs are driven higher, 1.4mA+...

what makes the 70 CRi 4000k not work from your experience? The SPD graph of the 4000k looks better than both the others and its like 5% higher efficiency than the lower kelvin COBs. I'm just curious because IDK. Were the buds looser? was the product not what people are used to? If you could...

This bulb is designed to fit a S52 mogul socket, which is what 99% of reflectors come standard with so you should be good there. Just make sure you don't buy a reflector designed for double-ended bulbs but you probably knew that. Some people might disagree but from my experience the BEST...

i think the ratio between G/KWhour of the entire grow room and G/PARWhour (yes, the hour need to be included here IMO) is a single number growers could use to rank each other. who can squeeze the most juice outta this lemon. It could be the ONE number used to say rank growers regardless of size...