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Theres a million ways to skin that proverbial cat. Why dont you share more info on what you want to achieve.

What kind of pump? May want to try an aquarium circulation pump if you arent already. I use one that moves ~800gal/hr at only 6w power.

Par watts are an easier metric to work with. But yes, ppfd is what you are aiming for.

Its all simply a function of how fast you can remove heat from the system vs how fast your light and pump are adding heat. The temperature then of the system will be more dependent upon ambient temperatures if you are using a radiator, as it will reach an equilibrium at (x) degrees above...

I should have been more specific saying hydroponics, soil is a whole different beast.

Dont give up on training your plants because of one mistake on your first go. Training pretty much always increases yield.

Flushing to clean your plants out is a myth. A myth that will never die because of stupid grower logic. Flushing to clean out your system is completely different...

I used to just run foam collars in my dwc... no medium or net pot.

I love this kind of logic. Along the same lines, co2 will kill me if its concentrated so I probably shouldnt expise my plants to any either, imagine what it could do to them if it can kill me!

If you spent that much on a light, why not spend a couple hundred on a meter if you really want to know? Or find out how to use it lol

This may work if you put a radiator on it. I use the same concept for heating my micro grow.

Lol. What are you getting at? Nothing he's saying is wrong....

You should be. The COB differences do appear to be a wash and you'd only be able to squeeze about 10 or so more watts out of the B setup so no not a big deal. either way youll be happy. The SEs are so nice with the push in connectors

I've come to the conclusion the regular data sheets are wrong, at least for the b versions. The SE data sheets are more accurate.

Should have went with the B versions if you went with separate suppliers.

Can you link to any of this research? Rarely do I see humidity mentioned when discussing co2 supplementation. Everywhere mentions higher temps but usually fails to amend the typical " ~50% rh" which according to vpd would be way too low.

I ordered my stuff from digikey. Don't know why you're limiting yourself for supplier.

VPD determines the stomatas actions. The only thin that your scenario would affect is a higher metabolism due to higher temps. The question is whether the plant is capable of photosynthesizing more light at higher co2 and light levels without increasing temps for a boosted metabolism.

Do you use hoods? If not adding some would probably help Couldn't you passively pull cold air fron the attic?

I have a space setup that I just made very close to these dimensions, do you flower in that cab and if so what can you pull outta that thing?