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You are really just making way too much out of one light producing more IR than another. If you want to bury yourself in a rabithole without actually explaining anything go for it, but I'm not coming along for the ride.

Perhaps a the folks at Agritech are also not as scientifically literate as you either. " High pressure sodium (HPS) lighting, has long been the workhorse in many indoor grow facilities. HPS emits in a broad portion of the electromagnetic spectrum that includes infrared (IR) energy – otherwise...

Well I guess that my highly accurate laser surface thermometer is not scientific nor is the fact that the results I get from doing this comparison are consistent and repeatable.

Here is a non sarcastic reply. There are too many variables to answer that question. Here is a tip, a decent grower should be able to average at least 1 gram per watt with a dialed environment and a proper canopy. Do the math.

Leaf temp is leaf temp.. my point was that HPS put out more light in a spectrum that causes excitation of molecules on the leaf surface. I have a laser thermometer for measuring surface temperature. Under my hps I can have up to a 6 degree Fahrenheit difference between air temp and leaf temps...

I find that a lot of plants under LED actually prefer 83-85. They don't tend to raise the surface temperature of the leaves like HPS does so they seem to like higher ambient room temps. I run around 83 under my HLG QB288s and my plants love it. They actually get kinda pissy if it gets under 78.

Led or hps?

I usually feed like I do in veg for the first two weeks of flower. Helps them stay healthy through the stretch. I also don't go as light on N as a lot of folks do during flower. I tend to stay a little more balanced with my npk.

Check the date on the post you're responding to.. :D

rDWC does tend to require less EC than traditional DWC so it's not a bad idea to lower your EC and see how she reacts. The nice thing about hydroponics is that you can see the changes you make take effect fairly quickly. It really can't hurt and nothing else you've tried has seemed to solve the...

I'm honestly not trying to argue with you, so I'm sorry if it comes off that way, but I've run both sterile and beneficial reservoirs before and high water temps have more often than not resulted in root pathogens. Anyway, hope your luck continues!

Well apparently the surface of the sun is free of pathogens because I ran rDWC for several years and any time my rez temps were over 74 i was playing Russian roulette with root rot....

Water farms rules!

Is nobody going to address the fact that OP said the reservoir temp was 80 when he changed it?? You gotta get your water temps down stat.

I bought kits. Really nothing close to double the cost of the knockoffs. Maybe 35% or so for something with the same components.

Hahaha :D:D

So much vitriol over lights. Jesus you people need to breath. I buy HLG because their customer service is top notch, their diy kits are affordable, and Stephen is a great guy. I once asked him about the proper driver to match a board I'd purchased from them and he sent me one he had laying...

Just make sure all the bleach is gone from the system before introducing the beneficials. I learned that the hard way many years ago.

I think the real issue is how 500 watts of led isn't enough.. how big of a space is the light over and how many plants? 500 actual watts of good led is enough to light a 3ftx3ft space and if it has high efficiency diodes it could probably do a 4x4. What kind of light do you have? I have a 135...

Great looking plants! Nicely done!