Is there optimal amount of light that you can give for photoperiod plants? 18/6 to 24 hours? And when to swap?

C

ComfortCreator

Well-Known Member
lusidghost said:
You're the one talking about pros and nature and whatnot. I would guess at least half of this forum runs 24/0. Maybe more, maybe less. Regardless, it's a large number of growers. Respectable ones at that.

My point is if there is any difference in outcome, it's so minute that it's not worth worrying about. If it's easier to run them 24/0, do that. If you prefer 18/6, do that. This is really the most trivial argument you can have pertaining to growing cannabis.
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I agree on the triviality! I have no idea why we are discussing this. It's mostly because 2835 insists DLI has nothing to do with the Sun. I'm done on this thread.
 
twentyeight.threefive

twentyeight.threefive

Well-Known Member
ComfortCreator said:
From wiki: "...Scientists have tried to solve this by reporting light intensity measured for one or more sunny days at noon, but this is grasping the light level for only a very short period of the day. Daily light integral includes both the diurnal variation and day length, and can also be reported as a mean value per month or over an entire experiment."

Notice the use of "sunny" and diurnal variation...DAY length.

"...Abstract

The National Renewable Energy Laboratory developed the >>>National Solar Radiation Database<<< to provide accessible solar radiation data to the research community for various uses. Previously, we created a series of monthly daily light integral (DLI) maps to provide a tool for horticulturists to estimate the potential growth and flowering responses for various plants throughout the year.>>> The original DLI maps were based on solar radiation data from 239 sites recorded from 1961 to 1990.<<<<< The DLI maps presented in this article were created from an updated database that included data from 1998 to 2009..."

You spend your time trying to police this sxxx and you are found to keep arguing that light intervals have nothing to do with the sun? All their experiments looked at plants growing outdoors. Yes my little genius, you can use DLI inside because they have studied it enough to provide some guidance. But for your crazy brain to think this concept is divorced from the Sun says you have never really grown anything outdoors before.

How stupid are you bro?
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Speaking of stupid…

You still haven’t given the definition of Daily Light Integral. I don’t care about some paper mentioning the word I’m looking for you to give the definition.

Here. Let me help you. A cut and paste from the world reknowned website Wikipedia like you just quoted.

Daily Light Integral

“Daily light integral (DLI) describes the number of photosynthetically active photons (individual particles of light in the 400-700 nm range) that are delivered to a specific area over a 24-hour period.”

The term itself has nothing to do with indoor or outdoor settings. It specifically refer only to a measurement.

You might want to have a grasp of a concept or definition before you start trying to debate it. You look silly.
 
Kassiopeija

Kassiopeija

Well-Known Member
When plant gets bigger can it take more light? As in longer, stronger? Does it have higher demand, where will the carbohydrates go, be stored, when consumed etc?
What else will be made from light, except sugar?

How to calculate the "DLU" here?
60455 (1).jpg
60455.jpg
I have 5 surface areas...
 
Kassiopeija

Kassiopeija

Well-Known Member
Delps8 said:
If you're questioning my authenticity, you're pissing up a rope. Further, I've seen your approach to questions and I'm not going to reply to again when you engage me in that manner. Discuss the topic, not the poster.
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you have authenticity? lol it was a rhetorical question to point out a false statement

the chart posted already states the CO2 level (also normal/atmosphere)
there's more works by Chandra - search for it

Here at RIU they will just copypaste from some US internet nonsense... like MaximumYield:

While under light, cannabis tries to prevent CO2 from leaving its cells by cutting off transpiration. However, this prevents new CO2 from entering the cell, blocking new growth. When the lights are turned off and no photosynthesis is occurring, the plant can absorb new CO2 into its cells.
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:wall::lol:

Goodbye from Maximum Yield

In print and online, Maximum Yield is your source for cannabis and cultivation knowledge, with informative grow articles and tips to enhance your life with mmj.
www.maximumyield.com www.maximumyield.com

Cannabis a cactus? (CAD/CAM)

NOOOOOO IT IS A CO2 PANT!!!
 
Star Dog

Star Dog

Well-Known Member
Would someone mind explaining what it is a plant does during dark period, as in how do they benifit from it?
 
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