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It is a combination of constant current / constant voltage. From meanwells site : MW constant current LED power supply possesses both “C.V.+ C.C.” characteristics. During startup it will operate in “C.V. mode”, which is suitable for LED driver IC and series resistor applications. Once output...

So how is getting an estimate using actual data better than using the actual data it's based on? You seem to be using ppf without even realizing it.

Ahhh I see. They don't look like the same light though. I stand corrected on tbh at point lol.

That is not the case with ppf because it doesn't even account for it...

20.1 / 650 is not less than .5 ;) closer to .87g/w

So height from the plant effecs ppfd but not ppf. That's an added variable my friend...

You're top post in your sig is flawed... about the blurple light... fyi. And the 6in results are not there...

PPF isolates one variable, the light. PPFD introduces many variables into the mix... it's really that simple.

I would think walls and reflectors could potentially have a significant impact of ppfd. No? We are talking mircomoles of energy here.... How much of an impact can changing reflectors have on a ppfd reading?

PPF is not effected by environment... PPFD is.... That wasnt retorhical though. If ppfd is significantly impacted by environment it is certainly not the best benchmark to compare lights. Correct?

How much of an impact does an individuals environment have on PPF vs PPFD?

TBF, Im pretty sure this exists, but it doesnt work like FLIR does. Pretty sure it uses respiration and/or heartbeat to detect humans. Like I said, in the event the cops are literally standing on your house, youre already fucked and have ample reason to be beyond paranoid lol. Google image...

The ones youre describing wont " see an HPS bulb though a concrete wall " unless youre not ventilating the room at all. Theres a difference between taking precaution and being paranoid. Fact is, youre creating quite a bit of heat with a grow op, and that heat HAS to go somewhere. A FLIR cam...

Are the nutrients taken in by the plant not metabolized into useful resources for the plant? Is this not how plants grow? The plant uses what it takes in in nutrients, its not like its taking in extra N P K etc and stockpiling it for later usage...

All Ill say is that if cops are physically holding devices up to your house to detect if youre inside (those sense human bodys) youre long since fucked. Basically, if you think theyre that capable, you probably will have a terribly paranoid time growing. Sleep well ;)

I have to call Bullshit unless you can cite anything saying such a thing. Thats just not how it works.

Smell and talking will get you busted ages before any heat signature does. Just sayin.

Through walls and a likely reflector?? I think not. lol The exhaust or heated walls are all its picking up.

What kind of metal is your frame/mount? Maybe it isnt conducting the heat efficiently enough. Like you said too, could be wires in contact with hot metal and melting the wire casing. If its getting that hot, that fast though I would think something isnt right.

make sure you have 200v+ input AC for it.