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Questions PAR readings / life stage

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Stoned Ape
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Geraniol
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Hi everyone!

so after lurking Around the forum a bit i see that some of you Are measuring the par in your grows, this inspierd me to want to take a look at my own par readings as i suspect that i tend to blast my babys with to mutch light…

after some readings on the wide wide web i found that the par meters is a bit pricy for me, but thankfully our man Shane from migro has testes a feve of the phone apps out ther against a propper par meter and found that the «photon» app for iOS is farley acurate and afordable Smile so i downoloaded it and that leads me to the question: what par is «optimal» for the diferent stages of the plants life? What do i aim for with cuttings, vegging and flowering? 
idk of it makes annet diference but i use a quantum led (lumatek zeus 600w) and the plants are in Aeroponic systems from start to finish.

anny help and opinion is mutch apriciated! Smile

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Posted : August 7, 2022 10:27 am
eggman, im_sparky, monkeydo and 18 people reacted
Stootie
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@stoned-ape I got one of those apps installed on my phone but thats about as far as I got 😆 I wasn't sure about the settings so iv never done anything more with it. Iv seen a few of the lads using the apps and propper meters here so some of them will likely be able to help you out when they get here 🙂 

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Posted : August 7, 2022 11:14 am
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Stoned Ape
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Tnx for the reply:) the app i installed ( photon for iOS) seems straight forward, select the type of light you Are using and cover the camera lence with a peace of 80gms printig paper to diffuse the light and i Get a reading, only i have no idea what Numbers to aim for :p chasing anny thing i can do to make my babies enviorment more hospitabel Smile

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Posted : August 7, 2022 11:30 am
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WoodI2
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@stoned-ape, here's quick  one, I just googled it. We have some other around here somewhere, you can try searching but the numbers will still be the same. 👍 

Growth Phase PAR Level (PPFD)
Seedling / Clone 100 – 300
Vegetative 250 – 600
Bloom / Flowering 500 – 1050
 
Posted : August 7, 2022 1:26 pm
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monkeydo
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Posted : August 7, 2022 1:32 pm
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@monkeydo, yep that's what I was looking for but the other one was quicker for me. 👍 

 
Posted : August 7, 2022 1:45 pm
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im_sparky
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@stoned-ape The Photone app will really help you dial in your lighting. It is a good app that converts your iOS device to something equivalent to a $1000 meter.  The start-up guide for the app could be better, though, so I understand how/why a person could be confused at first. Many people fry their plants thinking that more light is better, but given the proximity of the light to the plant (unlike the sun), if you get the light intensity too high, you need to supplement with CO2, which is much more complicated and not necessary for a good grow.

In Photone, since you have selected the light source and the length of time your lights are on, all you have to do is click the info button in the upper left, and scroll down to the medical cannabis lighting guide. Photone is a great app that references DLI (Daily Light Interval) which is PPF x duration, to yield total light falling on a plant for a day.  If you scroll down in the guide, you will see that there is a table and chart for DLI. 

DLI

Seedling: max 15

Veg: max 45

Flower: Max 40

If you go above these levels you should supplement with more nutrition, water, and CO2.

If you want to get the PPF when in meter mode, swipe to the left/right to  get that, as well as other metrics. Tap and hold on the bottom half of the screen to freeze the reading you take when the phone is at the plant height and level.

Because of my past professional life, I am a bit of a lighting geek. Let me know if I can help further.

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Posted : August 7, 2022 1:49 pm
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Stoned Ape
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Tnks so mutch for for the help/reply! I cant wait to start a new cycle now and test this out Smile

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Posted : August 7, 2022 1:50 pm
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@stoned-ape @im_sparky Yea I think Photon was the one I have, I was reading the instructions and got to the bit about the sheet of paper and I said Ah for fuck sake!! and switched it off, I thought it sounded complicated 🤣 I'll maybe have to check it out again sometime.lol 🙂 

In the corridors of power where the talks are in full swing
If you can't say it with flowers Then don't say anything

 
Posted : August 7, 2022 2:32 pm
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@stootie yeah man, you have to have the diffuser to make it work, and it works well. I leave my looped strip of paper hanging in my grow closet so I can just slip it on and take a reading. It works great.

To see a World in a Grain of Sand, And a Heaven in a Wild Flower,
Hold Infinity in the palm of your hand, And Eternity in an hour.
― William Blake

 
Posted : August 7, 2022 2:36 pm
WoodI2, Stootie, Stoned Ape and 12 people reacted

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