Smokexbreak
Well-Known Member
Agreed. Sometimes it takes seeing it from another perspective to see the lightbulb go off
Ethos Banana Hammock comparative(exodus thread)
- Thread starter Smokexbreak
- Start date
3rd Monkey
Well-Known Member
So... this lux meter is working good. Trying to find a conversion factor... not so good. HLG 100.
Anyhow, looking at the ppfd measurements and what they are at what distances, the lux x100 number seems close to what the ppfd is lol. There's a YouTube video of ppfd testing this light, my lux readings at those heights match the ppfd readings in the video pretty close. So... WTF lol.
Anyhow, looking at the ppfd measurements and what they are at what distances, the lux x100 number seems close to what the ppfd is lol. There's a YouTube video of ppfd testing this light, my lux readings at those heights match the ppfd readings in the video pretty close. So... WTF lol.
Or_Gro
Well-Known Member
Look at the lux to ppfd conversion link i posted several times...
The conver factor depends on the diode(s) not the board...
I assume that’s either a v1 or v2 diode...
3rd Monkey
Well-Known Member
I did that but I must be doing something wrong.
Gives me 1.73 as the result. Is that my conversion factor? That might make more sense.
Samsung diodes.
Or_Gro
Well-Known Member
Lay out your steps...
3rd Monkey
Well-Known Member
Think I see what I did.
Got 120 x100. Gave me 12,000 but I only put in 120. At 12,000 it gives me 173ppfd.
Used the 288 4K.
3rd Monkey
Well-Known Member
Nah that can't be right either lol.
Or_Gro
Well-Known Member
What? You did steps right..
CF 60-70...grenades...close enuff
This is just a reading to compare vs target, watch plants for what they can bear...
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3rd Monkey
Well-Known Member
Found a ppf rating of 235 on the board.
3rd Monkey
Well-Known Member
Board is about 33" away. He's just a little 100W guy.
3rd Monkey
Well-Known Member
Board at the top of the tent, almost 4 ft gets me 100 x100. Plugged in it gives me 143ppfd. I can't get it any higher. Just doesn't seem right to me.
Or_Gro
Well-Known Member
Why not seem rigjt? Too dim, too bright?
3rd Monkey
Well-Known Member
These are supposed to be smaller/cheaper boards I thought?
The guy in the video had 100ppfd at 36". I get that on my meter. 18", he had almost 300, same as what I get.
Using the formula, boards 4ft above the meter and I'm getting 143ppfd? Why the hell doesn't everyone buy these boards then lol.
Smokexbreak
Well-Known Member
Too many people got burned on cheap blurples so everyone and their moms a LED skeptic. Or they’re stuck in their ways with HPS.
3rd Monkey
Well-Known Member
I didn't think to try the meter on the HPS.
3rd Monkey
Well-Known Member
Well, where I would ordinarily put seedlings under the HPS is reading real close to 100... sonofabitch lol.
I don't know how much the conversion factor changes that. I do have 2 in there, so it just must be that bright.
I don't know how much the conversion factor changes that. I do have 2 in there, so it just must be that bright.
Or_Gro
Well-Known Member
Good, then sounds like your calcing correctly....
Cuz they’re frequently outta stock?
Or_Gro
Well-Known Member
https://www.apogeeinstruments.com/conversion-ppfd-to-lux/
btw...told you that meter would be useful...especially for a guy like you...take it outside...
ClydeWalters
Well-Known Member
I have a 2 week window I could stretch the flush out for I suppose.
My soil plants faded faster than this :/ it’s gotta be because of the submerged smart pots
Going home tonight to flip all the res’s over back to 60 ppm tap water
I don’t think I’m going to go buy 70 gallons of distilled water :/ gotta make due!
Thx for the advice guys
3rd Monkey
Well-Known Member
Yea, wow! That's absolutely crazy.