Randomblame
Well-Known Member
Do you mean it helps if you blow someone sugar in his ass?
Using 4 citi 1212 3000k to Veg seedlings - not going well...
- Thread starter Maersk
- Start date
wietefras
Well-Known Member
Why would a grower need a par meter?
When you build your own light you know from the datasheet how much light it produces (PPF). Or if you buy one, you'd make sure you know the PPF from the specs. Divide that by the surface area of the grow and you have an estimate of the average PPFD. What more do you need?
To check uniformity?
A lux meter suffices to check uniformity, but many of us did that already and I ran tons of simulations. Which all show that optimal height is related to distance between the strips in the fixture. The uniformity of light distribution is "good enough" when the height is between half the strip distance and the full strip distance. Below that range you get too much of dark spots and hot spots. When you go higher you are wasting light on the walls.
So you have your estimated average PPFD and you know the optimal height range to get proper uniformity. Done.
Perhaps you could deduct some percentage for wall losses. You could do that based on the height needed. What's the point though. Plants do fine under 250umol/s/m2 to 1500umol/s/m2. What is even 20% deviation on your estimate going to matter?
If you want to measure PAR levels for fun then fine, but none of us indoor growers need one.
When you build your own light you know from the datasheet how much light it produces (PPF). Or if you buy one, you'd make sure you know the PPF from the specs. Divide that by the surface area of the grow and you have an estimate of the average PPFD. What more do you need?
To check uniformity?
A lux meter suffices to check uniformity, but many of us did that already and I ran tons of simulations. Which all show that optimal height is related to distance between the strips in the fixture. The uniformity of light distribution is "good enough" when the height is between half the strip distance and the full strip distance. Below that range you get too much of dark spots and hot spots. When you go higher you are wasting light on the walls.
So you have your estimated average PPFD and you know the optimal height range to get proper uniformity. Done.
Perhaps you could deduct some percentage for wall losses. You could do that based on the height needed. What's the point though. Plants do fine under 250umol/s/m2 to 1500umol/s/m2. What is even 20% deviation on your estimate going to matter?
If you want to measure PAR levels for fun then fine, but none of us indoor growers need one.
As Humple mentioned, it's the same troll we had two times over here already under those forum names. Apparently he's trying to be as annoying as possible, waiting/hoping to get banned again.
Yeah I get that was just pointing out that head basically outed himself aftry trying to deny it
Slinging PAR
Well-Known Member
Mind trying that in proper English? weitefras liked it so it might be grammar commonly used by those with autism or some other mental defect.
Randomblame
Well-Known Member
You should at least try to write his name correctly, if you already point your finger at spelling errors, you senior teacher!
Slinging PAR
Well-Known Member
His made up internet name is irrelevant. Maybe he spelled it incorrectly? Both come up as incorrect in a spell checker.
Randomblame
Well-Known Member
Maybe try another language..
wietefras
Well-Known Member
Lol, I put up some actual debate and the loser chickens out. He knows I'll (or we'll) wipe the floor with him every time he tries to explain his nonsense. I did already dozens of times and even though he puts on a brave face deep down even he must know it. I know I shouldn't put down the geriatric, but this one is asking for it.
... Cue lame comeback on how he doesn't need to reply because he knows it all and how he was never wrong ... END.
... Cue lame comeback on how he doesn't need to reply because he knows it all and how he was never wrong ... END.
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