Indeed. Any meaningful test would need a large amount of plants for reliable data.
12/12 vs 18/6 ... DLI vs Yield
- Thread starter KodakB
- Start date
Indeed. Any meaningful test would need a large amount of plants for reliable data.
- Joined
- Oct 7, 2020
- Messages
- 13,231
- Reputation
- 9,550
- Reaction score
- 66,524
- Points
- 0
- Age
- 64
- Currently Smoking
- Yes
Seems like 2 pounds of work to try and get 1/2 ounce of product...it hurts my brain.
- Joined
- Mar 20, 2018
- Messages
- 386
- Reputation
- 37
- Reaction score
- 1,470
- Points
- 0
- Currently Smoking
- My Degree
Hypothesis, not theory. Yes, you are saying if you use a superior light that it will outperform an inferior light on 18/6. That does not mean the 12/12 light schedule will equal or out yield the 18/6 schedule given the same equipment. Plants can only take so much light intensity before you are harming them. Once you hit the sweet spot of intake, all that's left is duration of exposure. The light schedule argument is as old as autos appearing on online forums. Take some time to search around this site and other popular ones to see people do experiments with auto time schedules and output.
Everything on paper goes away the minute that seed hits the soil. The plants aren't wrong.
Everything on paper goes away the minute that seed hits the soil. The plants aren't wrong.
So, from the various and sundry charts that I’m seeing, my little Niemi 130 type light with the top BIN Samsung 301B’s and red diodes (HLG 135 equivelant) in a 2 x 2 space at 18 inches at 700 ppfd in the center of the grid, should give me between 52 and 60 DLI onl a18 to 24 hour schedule. Does that sound about right? What do you actually need for autos for quote for performance?”
- Joined
- Mar 20, 2018
- Messages
- 386
- Reputation
- 37
- Reaction score
- 1,470
- Points
- 0
- Currently Smoking
- My Degree
I run an HLG 135. Your light will give you fantastic results with autos on an 18/6 or 20/4 light schedule.
You still dont get my point. I'm not here to argue what light schedule is better for autos.
I'm just saying that with the recent studies from Dr. Bruce Bugbee pointing that DLI is the ultimate light measure, it opens the question about autoflowers and if light schedule actually matters or in fact its DLI that only matters... Because you can have the same DLI with different light cycles.
Being able to run different light cycles with equal final yield, would have various advantages for many growers...
Everything that happens, happens for a reason, and there's always science behind it.
Last edited:
- Joined
- Mar 20, 2018
- Messages
- 386
- Reputation
- 37
- Reaction score
- 1,470
- Points
- 0
- Currently Smoking
- My Degree
I get your point completely, I just think you're wrong. You're not talking about running different light cycles for the same yeild, you're simply saying a high quality light run 12/12 will outperform a mid to low quality light run 18/6. What I am saying is yeah no duh.
If you run your autos 12/12 you are going to get a reduced harvest, period. If it is advantageous to run your lights 12/12, then grow photos.
There's nothing new or special about that revelation, and I honestly am not concerned with what doctor youtube has to say about plants. Get a few grows under your belt and get to understand autos better, then revisit this.
If you run your autos 12/12 you are going to get a reduced harvest, period. If it is advantageous to run your lights 12/12, then grow photos.
There's nothing new or special about that revelation, and I honestly am not concerned with what doctor youtube has to say about plants. Get a few grows under your belt and get to understand autos better, then revisit this.
You dont need a better light. Closer light distance increases DLI. I'm done arguing with you.
The other question may be how much is too much? We see these autos they have huge heels but are most auto is genetically limited and how much they can heal it is it connected to how much like they can tolerate without additional CO2?
Another question. When it comes to working with artificial lighting in doors, PPFD and as a result deal I are going to vary depending how close you are to the light not only in height but also distance to the side. Are we going to be using the numbers at the center of the grid are we going to be using the average PPFD between the center and the edge to figure out what our DLI is? I know it’s easier with the sun because the sun is everywhere and it doesn’t lose any intensity in the maximum of 15 feet between the top of your giant sativa in the ground. LOL
