How PAR Readings Change with the Time of Day (Student Series)

[@blackeyesforyou]

Now, I only use an app to measure par but it serves me well. I recorded at about 9am one morning >3000 ųmol/m2/s. I've measured reading of 2600-2800 at noon but never that high and so early in the day. I'd like to see your reading at 09:00/12:00/15:00 and the DLI.

[@DeBaccoUniversity]

Those reading seem high. See 3:00 for the full table with noon = 1854 and 15:00 = 1750

[@thegrowunderthestairs]

Love the info and channel, but Anyone else look at prof deBacco and wonder in the back of your head how many body parts he stores in his refrigerator at once? No? So it’s just me? Ok then, keep up the good work good sir.

[@DeBaccoUniversity]

Did this video contribute to your theory... kzbin.info/www/bejne/oWaQeoapps2io8U

[@notbeefyproductions7109]

You guys are awesome,Thankyou :)

[@DeBaccoUniversity]

You are welcome!

[@legalizationnow420]

I really love your videos. I show them to newbies for bugs, pm , ect

[@DeBaccoUniversity]

Thanks for spreading the word about the channel, encourage those you show the channel to to subscribe;-)

[@legalizationnow420]

@@DeBaccoUniversity Will do. It is impossible to explain pm to someone who nothings about mycology. Your pm video saves me a lot of teaching time.

[@dano9411]

This explains a lot about my window plant. She's not getting very big, but I love being able to see her without peeking in a tent!

[@DeBaccoUniversity]

Actions have consequences.

[@chaddydaddy4093]

Your a bad ass man for real, keep up the amazing content!!!!

[@DeBaccoUniversity]

Thank you for your comment on a student series video.

[@StephenRobertThorburn]

Please do an episode about wax/rosin terpene liquefiers. Thanks!

[@DeBaccoUniversity]

Thanks for the suggestion.

[@paulfedor9828]

UV Index of 12. I am growing in SoCal Dessert area in the Temecula Wine Valley. We had a horrible summer in 2022. We had over 45 days of 100 degree F. Turpines Roasted and evaporated in the heat. (I now have orderless plant material) ....Maintaing water was insane. I think there was a lack of THC production due to heat. Nursery's down here advise UV netting. Often UV index is 10+......and can fry a Palm tree. Tree Nursery's advise only partial direct sunlight for outdoor. Being from NJ ...I have never had to grow in such Extreme heat. I have to start taking light meter readings.

[@DeBaccoUniversity]

Regular shade netting would be a start, but also consider the humidity factor.

[@paulfedor9828]

@@DeBaccoUniversity WHat about humidity which is like %30-40 regularly???

[@dabcrafter4208]

Not all PAR meters are created equal for instance measuring PAR for LED lights you want to use a Apogee PAR meter or similar quantum meters.

[@DeBaccoUniversity]

This one has an electronic or outdoor (sun) option to make for a two in one device.

[@Freedom_Born]

Gday from Down Under Matt. Just dropping by to see how you’re doing. Hope everything’s well man. Okay brother, can’t wait to see new content from you and the (student series) team… if that’s still happening, but regardless, as long as you’re healthy and well, that’s all that matters. Take care Prof. See you soon.

[@DeBaccoUniversity]

Been very busy with the students so channel content has been at a minimum, but hope to get some more videos out.

[@Freedom_Born]

@DeBacco University As long as you’re healthy, happy and well, that’s all that counts. Awesome to hear everything’s still going great. Hope you’ve been out angling lately 🎣 Nonetheless, enjoy the festive season to you and yours Matt, and look forward to seeing your content for ‘23. Much love from Down Under ❤️🤙🏾

[@stevesimbaj7790]

This video is reading high on my PAR meter!

[@DeBaccoUniversity]

Glad you liked it.

[@stevesimbaj7790]

@@DeBaccoUniversity I love all DeBacco University videos and have gained good knowledge because of them.Much appreciated!

[@rameikbennett7418]

Hey could you show us a how to identify deficiencies in flowing video please?

[@DeBaccoUniversity]

Same in flower or veg..... kzbin.info/www/bejne/kIWoXox5g7x2btU

[@igounfazed]

I looked through your videos but couldn't find anything on: 1. What happens to plants you do not harvest? 2. The 'ruderalis' strain? If you have something along those lines, can you please link it? If you don't have anything along those lines, could you please consider them as future video topics?

[@DeBaccoUniversity]

1. Plant you do not harvest essentially go to waste (advised against this;-) 2. Ruderalis... kzbin.info/www/bejne/oWaWomdvn99gipI

[@420Treez]

Thanks guys

[@DeBaccoUniversity]

You are welcome!

[@ericbridges9]

please show the spectrum at differant times with par

[@DeBaccoUniversity]

This would require a different instrument but thanks for the suggestion.

[@unklekracker2796]

Advise on transitioning seedlings raised under lights to outdoors would be appreciated. Great videos 🙂

[@DeBaccoUniversity]

This DeBacco University video may provide a start... kzbin.info/www/bejne/nnvVe2ZmeLCckNk

[@ironvikinggod]

would it be worth the study to see how the plant would react to varying degrees of lighting intensity as it gradually cycles through a 24 hr period. also could it be beneficial to study the effects of varying degrees of heat treatment as it goes through the same cycle? also would you advise the use of a humidifier only when the temperature is lowered and the lights are off?

[@DeBaccoUniversity]

The artificial lights sun rise sun set features are typically not needed the key is PAR reading and this was to show how it can look bright, but how quick the PAR degrades. Humidity is key for VPD (Vapor Pressure Deficit and this is independent of lights on or off.

[@rusbelpareja3091]

Saludo desde colombia suramerica gracias

[@DeBaccoUniversity]

¡Colombia, Sudamérica, de nada!

[@paulie6446]

Is there any point in taking outdoor readings?... you can't turn the Sun down or up 🤷🏼‍♂️

[@DeBaccoUniversity]

You can turn it down with shade netting and it is important to know how this compares to the sunrise/sunset times growers use to determine day length.

[@josh2663]

650w led, 6 inches distance at 780 PAR, there is no way thats correct

[@DeBaccoUniversity]

See this video for data collection... kzbin.info/www/bejne/Y5WldKeNqq9lmcU

[@skepticalgenious]

Does altitude effect the photon flux density? I am a minimum wage worker but pondering if the photons traveling through our atmosphere would be less effective for plants at sea level vs 12,000 ft. Love the video's. Very thought provoking. Great job

[@DeBaccoUniversity]

This article should help provide some data to your question... www.researchgate.net/figure/Photosynthetic-photon-flux-density-PPFD-at-high-altitude-and-low-altitude-in-the_fig1_324043541

[@skepticalgenious]

@@DeBaccoUniversity It's a bit more complicated then a simple yes or no. Thank you good sir.

[@Yeshua-Is-God-1]

@@skepticalgenious The higher the altitude the closer you are to the sun. That is because earth is flat and the sun is not 93 million miles away

[@TRUSTME183]

In California the sun is shining so bright the instruments can’t even give an honest reading💯%fact this sun gives off more then just heat and par

[@DeBaccoUniversity]

...at least when there is not wildfire smoke in the way.

[@TRUSTME183]

@@DeBaccoUniversity FUNNY 😁 that’s like me saying if the hurricanes 🌀 don’t get in the way!

[@TRUSTME183]

@@DeBaccoUniversity I know one thing that CARBON is a KEY FACTOR in RAIN 🌧💯% so if trees didn’t burn & release the carbon in the atmosphere plants 🌱 wouldn’t grow! Be thankful for 🔥 I would rather deal with smoke any day over hurricanes 🌀💯%

[@NotHumant8727]

Par by artificial lightnings drops quickly with distance, outside it does not. How this affects yield and how can one improve that.

[@DeBaccoUniversity]

More lights or a pruning method that maximizes the coverage for the light.

[@johnmartin5153]

what par reading is necessary for nice healthy growth?

[@DeBaccoUniversity]

This should provide a good reference summary for you... www.420magazine.com/community/attachments/screenshot-fluence-science-2019-02-13-00-18-00-png.1722841/

[@scottietimmons3322]

I would like to see the difference of spectrum change. Say how much far red in morning, and how much in the evening. What is it 720 nanometers or something? Then the blue. See which increased at what time and how much. Talk about dialing in a DLI and possibly increased flower start and finish. Crop steering ..

[@DeBaccoUniversity]

Light spectrum studies are currently being investigated;-)

[@scottietimmons3322]

I wish I was there helping them. Not that I know.. but I'd like to help learn.

[@stefanr8400]

How do the light and CO2 value work together? I know at some point more light in Indoor grow is useless cause the Plant is missing CO2 or was it otherwise? However, nice video keep on track guys.

[@Bergwacht]

At what PPFD do you need CO2? Generally, optimum levels of CO2 will be two to four times the normal atmospheric levels (800 - 1,400 ppm CO2) when growing under high PPFD conditions. We recommend supplementing ≥ 800 ppm CO2 into your controlled environment when you are providing your plants with ≥ 500 μmol/m2/s. fluence.science/wp-content/uploads/2018/11/Fluence-Photobiology-Guide-2019.pdf Page 4

[@DeBaccoUniversity]

This DeBacco University video should help you out... kzbin.info/www/bejne/q3K0kJuba8d4pbs

[@mikegreer9041]

I get better product growing indoors with cheap led lights. I have to think the consistency of the light pays off. outside I only get about 6 hours of good sun.

[@DeBaccoUniversity]

It all depends on the environmental comparisons and in this case indoors sounds more plant friendly than outdoors for you.

[@ungarnunsereneueheimat3868]

why no more videos?

[@DeBaccoUniversity]

Interesting you should ask.... several are in final edit and should be out around the New Year! ;-)

[@Spinozin]

Does sitting under LED grow lights help combat depression? The lack of sunlight related depression I mean. Many thanks

[@DeBaccoUniversity]

It can depend on what spectrum the lights are producing, but if it is intended to be similar to natural sunlight it certainly should help.

[@Spinozin]

@@DeBaccoUniversity thank you doctor xxx

[@brewsandbass5572]

I'm surrounded by mountains so my par is screwed up.

[@DeBaccoUniversity]

This does add a variable.

[@Bergwacht]

oh crap :(

[@rocdajacable]

So ... I guess I have to ask what was the ultimate purpose of this particular video other than the obvious. Grasshopper needs to learn

[@DeBaccoUniversity]

To show how quick the PAR of sunlight decays and how well before sunset the PAR can be in the single digits.

[@rocdajacable]

@@DeBaccoUniversity Grasshopper has understanding now

[@vovachepur2834]

Лайк за информацию.

[@DeBaccoUniversity]

Нравится комментарий.

[@dano9411]

Uh oh, I didn't comment yesterday. Did I break it?

[@DeBaccoUniversity]

Glad to know you are still alive;-)

[@igounfazed]

Do you have a video on unpollinated feminized plants that produce 3 or 4 seeds with a very low germination? Say 1 large heavy plant that has a few seeds in random locations even though the plant itself was never pollinated.

[@DeBaccoUniversity]

Many videos on this channel, but not this one.

[@igounfazed]

Would you happen to have explanation for why an unpollinated plant may still produce 3 or 4 seeds in random locations?

[@charlesgress4752]

What about sunrise to noon?

[@DeBaccoUniversity]

Simply take the opposite as the noon on based on the hour compared to the sunset time provided.