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LED and BUD QUALITY
- Thread starter Tropical Sun
- Start date
my light is experimental. i don't recommend building one just like it. i did this to help me understand beam spread, overlap, and the influences of power and spectrum.
i can make the light perfectly even all the way across on the next one from what i've learned using this one.
i'm living in a drafty old farmhouse right now while i build a home. when i get into the new house i'll build a more refined one. or 10.
oh no, snipp, i think i see an underdeveloped trichome! but i'd smoke it anyway!
i can make the light perfectly even all the way across on the next one from what i've learned using this one.
i'm living in a drafty old farmhouse right now while i build a home. when i get into the new house i'll build a more refined one. or 10.
oh no, snipp, i think i see an underdeveloped trichome! but i'd smoke it anyway!
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When you found you setup - theres a company in Germany where you can order custom designed led boards with whatever you want on it. Whatever...
Not much more expensive than standard boards. If you can put together the rest...
May i ask where you are from?
born in washington state but have lived in every state that has a navy base.
my ancestors were poor dirt farmers from mississippi and alabama.
i spent 15 years in puerto rico diving. i have lived in key west fl, eugene or, the us virgin islands, tennessee, and got in a lot of trouble everywhere.
i ran away from home at 15 and lived on the street in san francisco selling lsd and weed.
i have been a day laborer and a stock broker, a corporate executive and a janitor.
been to prison for felony sales of cannabis.
used to drink a lot and get into bar fights. i've been shot twice and stabbed once.
other than all this i've lived a normal life.
my ancestors were poor dirt farmers from mississippi and alabama.
i spent 15 years in puerto rico diving. i have lived in key west fl, eugene or, the us virgin islands, tennessee, and got in a lot of trouble everywhere.
i ran away from home at 15 and lived on the street in san francisco selling lsd and weed.
i have been a day laborer and a stock broker, a corporate executive and a janitor.
been to prison for felony sales of cannabis.
used to drink a lot and get into bar fights. i've been shot twice and stabbed once.
other than all this i've lived a normal life.
i forgot to mention multiple car wrecks. not with other vehicles just too drunk to see the bridge or the cornfield or the apartment building under construction. or that poor cow.
i turned a brand new caddy belonging to someone else into a submarine. they dive well but don't surface when you want them to.
alcohol is not my friend.
"hey, watch me dive head first off this railway bridge 75 feet above the water". that shit's like concrete from that altitude. i couldn't turn my head for a month from the whiplash.
i turned a brand new caddy belonging to someone else into a submarine. they dive well but don't surface when you want them to.
alcohol is not my friend.
"hey, watch me dive head first off this railway bridge 75 feet above the water". that shit's like concrete from that altitude. i couldn't turn my head for a month from the whiplash.
Ca++
Well-known member
50" = 127cmThis is a not so bad idea at all..
Good to see we get on a adult discussion level.
1.27 x 1.27 =1.6m2
1700w@~1.7umol/w = 2900umol
2900/1.6 = PPFD ~ 1800
That 1800 is difficult as I'm guessing typical 14w 1500lumen lamps. It would also be center stage of an installation with no edges. So that 1800 would also require 100% reflective walls, set just right.
Quick look at the grid of actual measurements... 1800
Can ppfd be calculated from ppf ?
edit: Did I use height, or area.
led05
Chasing The Present
Lol - exactly…. But If you can sniff it another way I’d pay to see that
- off topic but heroes on topic so perhaps not too bad…. Normally those games of Pong began with a couple hits Sid too; case a beer each would barely phase us then & back then, crazy… late teens…. I’ve built maybe 30-40 lights in my day; here’s one I’ve still got pic of and in use 640w IIRC
I’ve even built LED with HID in one fixture but disassembled years ago as it was far too bulky and dated tech
Many ways to skin a cat; time and place for both LED & HID, they work great together, especially HPS & LED
HPS is tons of cheap far red & IR, no better way to get it and you’re crazy if you think your plants don’t benefit from it…
Peace y’all
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i did not say you couldn't calculate ppfd knowing power and area. i'm saying that for practical daily use a meter at the target is perhaps easier.
i normally run it with the skirt on which radically changes the readings.
i need to remove some of the center bulbs on this one.
what the readings show is that dead center you have the greatest beam overlap so this area could be "thinned".
when i get in my new spot i intend to illuminate an entire room at this level.
i normally run it with the skirt on which radically changes the readings.
i need to remove some of the center bulbs on this one.
what the readings show is that dead center you have the greatest beam overlap so this area could be "thinned".
when i get in my new spot i intend to illuminate an entire room at this level.
I'm in the right place nowLol - exactly…. But If you can sniff it another way I’d pay to see that
…. I’ve built maybe 30-40 lights in my day; here’s one I’ve still got pic of and in use 640w IIRC
View attachment 18740769
I’ve even built LED with HID in one fixture but disassembled years ago as it was far too bulky and dated tech
Many ways to skin a cat; time and place for both LED & HID, they work great together, especially HPS & LED
HPS is tons of cheap far red & IR, no better way to get it and you’re crazy if you think your plants don’t benefit from it…
Peace y’all
Cerathule
Well-known member
If you go to bloomtech, which is a cannabis lighting manufacturer and growshop, there you will see almost 100 such ppfd plots. That guy designed a measuring area with variable walls and a green floor, as to resemble a plant canopy. Later took his readings to calculate the average PPF & PPE from these PPFD plots.
Here's the kicker:
Occassionally he measured the very same lamp, with the same power draw from the wall, but changed either hanging height, footprint, or both.
To get 4 different PPFD plots.
Ironically, the PPF & PPE calculation *also* changed! And by much, like +-20%!
But that is an error. It's completely wrong.
That lamp run by same power did produce always, and exactly, the same amount of photons per second, regardless were he put it, or if there was a wall set more distant.
It's the same current running through these diodes and what is released is also the same.
The PPFD plots are very helpful for customers to get an idea about optimal hanging height, or light dispersion.
A quantummeter is very nice tool to get an idea of the photonflux directed at a place, but it doesn't measure all photons reaching there. And thus, all the wrongly calculated PPF and PPE numbers are a large fraction lower as what a professional lightlab did report.
Ca++
Well-known member
You said umol didn't exist at the lamp, lumens do. Then went on to say
LED weed looks strong enough to me. I read 5-10mg was a government approved dose. The edibles I get claim 50mg. My mate ate a whole pack @ 500mg and said it was alright. That's 100 government doses. Alright he said.
I guess our expectations differ. He smokes my green pretty much exclusively. LED grown sets a standard.
Regarding the 'hump' under the light. I mapped out individual e27 lamps. I found a grid of 9, better without the middle light.
The size of the squares in the grid, needed to match the lamp height to give that spread. So in a 3x3 the lamps would be 1 high. At which is was really workable. Even dropping them lower, where the middle figure would be depressed, seemed preferable to the whole outer ring having less light. That hump was one of HIDs biggest failings.
My best results so far have been a HID LED mix. The side by side grows to prove LEDs worth. So I must sit near the fence. I use just LED, which beats HID, but still the MIX as I transitioned over was the best. Under the LEDs that just got stray HID lighting. So perhaps it was another key difference, as a lot has changed.
I did a pollen run with males with LED....they were awesome. I got plenty of Dough G pollen. They were healthy and excellent. 630ish watt PLC LED fixture.
Just my experience and it has been limited.
Peace, negative.
Just my experience and it has been limited.
Peace, negative.
I still cant get the hang of it, back in the day no one wanted to put 50 cfl lights and grow with them, claiming they are low powered lights, now everyone puts 300 even lower watt\par lights and claim they are superior, common sense and logic is out the window, go figure
Ill say it like this, Im reserving judgement until all the facts come out
Right now it seems that LED is the smoking gun in our quality problems
Im about to finish a HID cycle, ill let you know if i got the old buzz back
Ill say it like this, Im reserving judgement until all the facts come out
Right now it seems that LED is the smoking gun in our quality problems
Im about to finish a HID cycle, ill let you know if i got the old buzz back
Quality problems???....don't seem to have those here under the LED...but each individuals results may vary.
Peace, negative
Peace, negative
