I use DLI to set my lighting and adjust that through the growth stages. Basically equates to the same as PPFD just different methods.
Week 4 and the max I’ll push the lighting and will dial this back around week 6ish.
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@Mntmannw juat like OG does, push them around 1000 umol’s while they’re building and then around week 5-6 I bring it down to 600 umol’s to ripen and finish them out.
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Ok, DLI, PAR, UMOL’s, LUX, Lumens ……
I have a meter that reads Lux, and the PhoneOne app that I can do DLI.
So, which would be easier to convert to Lumens, or are they the same?
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Ok, I think my brain woke up this morning, DLI around 46 would be about 1000 umol’s, so somewhere around 23 -24 would be 600 umol’s
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That sounds about right 
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Here is a calculator to help on the lighting journey
Why am I always out of likes 
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@Mntmannw heres a thread on it all. It helped me a bit. Actually it helped me to decide to just buy a meter that reads umol’s and make my life a hell of a lot easier. I don’t want to calculate 
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Lol, yes I’ve read that once and walked away more confused then when I started 
O you have one in mind that you would recommend?
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PAR stands for Photosynthetically Active Radiation, and it refers to the wavelengths of light that are most useful for photosynthesis, the process by which plants use light energy to convert carbon dioxide and water into glucose (a type of sugar) and oxygen. PAR is measured in micromoles per square meter per second (μmol/m²/s). It includes wavelengths ranging from 400 to 700 nanometers (nm), which includes the visible light spectrum as well as some ultraviolet (UV) and infrared (IR) wavelengths.
PPF stands for Photosynthetic Photon Flux, and it refers to the total amount of PAR light that is emitted by a light source. PPF is measured in micromoles per second (μmol/s). A higher PPF value indicates that a light source is emitting more PAR light, which can be beneficial for plant growth.
PPFD stands for Photosynthetic Photon Flux Density, and it refers to the amount of PAR light that reaches a plant’s leaves. PPFD is measured in micromoles per square meter per second (μmol/m²/s). It is important to measure PPFD because it can help you determine how much light your plants are actually receiving, which can impact their growth.
DLI stands for Daily Light Integral, and it refers to the total amount of PAR light that a plant receives over a 24-hour period. DLI is measured in moles per square meter per day (mol/m²/day). DLI is an important factor to consider when growing plants because different species have different light requirements. For example, some plants may need a high DLI to thrive, while others may be able to grow well with a lower DLI.
Now that we’ve defined these terms, let’s delve into each one in more detail.
PAR
As mentioned above, PAR refers to the wavelengths of light that are most useful for photosynthesis. These wavelengths are within the visible light spectrum, which includes red, orange, yellow, green, blue, and violet light. Different wavelengths of light are absorbed by different pigments in plants, with the main pigment being chlorophyll. Chlorophyll absorbs blue and red light the most efficiently, which is why these wavelengths are considered to be the most important for photosynthesis. However, other pigments such as carotenoids and phycobilins can also absorb light, and they are responsible for the yellow, orange, and green colors of some plants.
PAR is usually measured with a PAR meter, which is a device that uses sensors to measure the amount of PAR light that is present in a given area. PAR meters are commonly used in greenhouses and other controlled growing environments to ensure that plants are receiving enough light for optimal growth.
PPF
PPF refers to the total amount of PAR light that is emitted by a light source. It is important to consider PPF when selecting a light source for your plants because a higher PPF value indicates that the light source is emitting more PAR light, which can be beneficial for plant growth.
PPF is measured in micromoles per second (μmol/s). The PPF of a light source is determined by its intensity (the amount of light it emits per unit area) and its spectrum (the wavelengths of light it emits). A light source with a high PPF
value will be able to provide more light energy to your plants, which can increase their growth rate.
However, it’s important to note that PPF is not the only factor to consider when selecting a light source. The spectrum of the light is also important, as different wavelengths of light can have different effects on plant growth. For example, blue light is often considered to be more beneficial for plant growth than red light, as it is absorbed more efficiently by chlorophyll.
PPFD
PPFD refers to the amount of PAR light that reaches a plant’s leaves. It is important to measure PPFD because it can help you determine how much light your plants are actually receiving, which can impact their growth.
PPFD is measured in micromoles per square meter per second (μmol/m²/s). It can be measured with a PAR meter or a quantum sensor, which are specialized devices that are designed to measure the intensity of light.
There are a few factors that can affect the PPFD that a plant receives, including the distance between the light source and the plant, the angle at which the light hits the plant, and any obstacles that may block the light from reaching the plant. By measuring the PPFD, you can determine if your plants are receiving enough light and make adjustments to your lighting setup if necessary.
DLI
DLI refers to the total amount of PAR light that a plant receives over a 24-hour period. It is an important factor to consider when growing plants because different species have different light requirements. Some plants may need a high DLI to thrive, while others may be able to grow well with a lower DLI.
DLI is measured in moles per square meter per day (mol/m²/day). It can be calculated by multiplying the PPFD that a plant receives by the number of hours that it is exposed to light each day. For example, if a plant is receiving a PPFD of 50 μmol/m²/s for 16 hours per day, its DLI would be 800 mol/m²/day (50 x 16 = 800).
It’s important to note that the DLI that a plant receives can vary depending on the time of year and the location of the plant. For example, a plant that is grown in a greenhouse in the summer may receive a higher DLI due to the longer days and higher intensity of sunlight. On the other hand, a plant that is grown outside in the winter may receive a lower DLI due to the shorter days and lower intensity of sunlight.
Conclusion
PAR, PPF, PPFD, and DLI are all important factors to consider when growing plants, as they can impact the growth and health of your plants. By understanding what these terms mean and how they are measured, you can make informed decisions about your lighting setup and optimize the growth of your plants. Whether you’re a professional grower or a hobbyist, understanding these concepts can help you achieve success in your plant-growing endeavors
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There are few PPFD meters on the market.
I’d also be careful if you choose to use the DLI chart listed in the post AFG shared. Since switching to an actual meter from photone I’ve struggled to get passed 45 DLI (1041.67 ppfd) whereas that posts suggests to hit 60 DLI (1388.89 PPFD) for the vast majority of the grow. I used photone for nearly 2 years before getting a meter and pushed that 60 dli every run. Anyone else??
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Would it be advisable to try and mimic the average DLI in my area? According to the map, I’m in the 40-45 arena. Come September I drop to 30-35, so when i go about 1/2 way into bloom, about week 4 or 5, slowly dial down to 30-35? That would be about 690 umol’s
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quote=“Low, post:331, topic:98472”]
Anyone else??
[/quote]
All I can say is: The “original” chart by B. Bugbee tops the DLI at around 46 DLI. The other chart, the one quoting 60 DLI, is the “modified” version by Nicky… 
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Great place for flower!
@kaptain3d I wanted it to work. I’ve brought it up a couple times with no real resolution of the discrepancy. He’s a cool cat no doubt I think there is just something off. The first run with the meter trying to push 60 I thought something else was wrong. But then it happened again. I think the happy place in my last run was 43-44 to keep everyone happy.
Bugbee is king. I’d definitely follow his suggestions.
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I use this one, think Low does too
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And that may be why I trashed it. Something wasn’t adding up.
I love simple!
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I remember in one of his videos he said, “600 umol’s is a nice sunny day”
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Funny, that’s the one I ordered based on the reviews
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That makes sense on the intensity scale! N yeah I use the photobio too. I’m happy with it.
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I’m not really sure what a sunny day is, but a ppfd average of 600 will run a nice grow.
A dli of 45 is still even pretty aggressive. There’s at least a fee studies thst have this well into point of diminishing returns. When building a light for myself I like to have capable of 800 umols/m² but will typically only run that hard if I need the heat.
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Just tossing stones across the pond… but…
These plant’s are living thing’s…
If we want them to perform, we do everything that we can to help them accomplish my goals and not reproduce
at the same time…
Unless i need offspring… 
(IE) give me fat budd’s and not Shoot nanners… and piss me off…
Sometimes we sit and admire how this is even possible…
And yet , it is…
and yes i enjoy every part of this whole pain in the a$$ process… 
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