Your Smartphone is a Quantum Par Meter | “Photone” App
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- Опубліковано 5 жов 2024
- This video is not sponsored by the app developer. I have been meaning to do a video comparing a lux meter to a smartphone app, but no apps that I know of have had reliable and repeatable results until now. In order to use a camera on a smartphone and get consistent results when used as a light meter, it must have calibrations for various light sources. These days there are too many different types of light sources to produce consistent results. That's why this app has calibrated lighting types to choose from.
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Thanks for watching! I have to add that this will not replace a true par meter if you need one to test light efficiency or conduct experiments. However, if you only need it as an aid or tool for your indoor growing then its perfectly suitable.
Thanks for sharing the information. ✌😆🌿
@Peter Lustig actually there is a standard. It’s not much different than measuring temperature with a thermometer or distance with a ruler. Photos are very easy to measure. It’s why digital cameras can take perfectly exposed photos automatically without user input. It’s all just math and calibrations within a small level of tolerance. The only problem is that if someone uses that app and has no way to compare it to a calibrated tool, it’s hard to trust it. It’s close enough for the average person who doesn’t need level of accuracy. It all depends on the what it’s needed for. A simple lux meter could be traded for a par meter for better reliability but that comes with its cons too.
Not seeing this app on android. Any suggestions for people not using apple?
@@kevinnolastname2220 I reliable lux meter app used only for white lighting is a decent aid.
@@GrowingAnswers Will that still give value to red, far red, blue and far blue? Or is it just using yellow/green and you have to "close enough" it?
Heads up viewers: the name of the app was changed from "Korona" to "Photone" (first name was bringing up apps related to the pandemic when you searched).
Thanks bro. Just got here and was confused. Thanks for clearing up
the fact ive been looking for a good Par meter and the cheapest on is 150 and i only by chance found this is crazy to me. youtube needs to bump this
Even if it is not 100% accurate it would appear that it is still much better than just using your eyes. I would have never considered something like this, thanks for making this video. Cheers m8!
Thanks a ton for this video. I was just about to invest in a PAR meter when I saw this. More than acceptable accuracy.
It’s free but if if you want the led option you have to pay for that, but if you have an IPhone, you can “buy” whatever spectrum you need and just go into the App Store settings and ask for a refund (HELLO) and Apple will gladly give you your money back and u can keep whatever you bought. I’ve been doing this for years
Sunlight setting works fine and it’s free. Unless a blurple light is used
@@GrowingAnswers you the man bro. when my plants wake up Ima try that pvc thing
Had this for months and boy is it useful. Only bought the full spec led add on but that’s all I need and my plants love their sunbathing hours.
I found out because of this app the reason my white ghost chilli wasn’t happy yesterday
Thanks a bunch for doing a par comparison between the app and a device. I’ve been using a blurple for the last 12 years to growing vegetables from seed to outdoor planting. See that prices finally came down, picked up several full spectrum LED from various manufacturers.
This is awesome for a noob getting into planted tanks to test my lights par at different percentages and depths before actually filling with substrate and planting. Thanks for this!
I will buy this immediately if they bring it to the google play market
If you're on Samsung just go 0*#0*# in calls on the keypad, then goto sensor for the lux reading.
@@lelouchlamperouge4273 PAR is not LUX
Checkout "tent buddy" or "ppfd meter - plant grow light meter" on android
@@DimitrisDr3am Not sure it works on every Android, it has to be calibrated and I doubt the developer is buying so many Android phones to calibrate for each one of them.
@@Pompiduskus Just divide LUX reading by 3.05 to get PAR? its not hard
The real reason it is only on app store and not on google play is probably the wide range of android devices they have to calibrate to as for the apple devices you have only couple of them to calibrate correctly
Ewe huemans...
I was really excited until I saw the link. Apple only. Blech
Welcome lads, link to a video featuring android par app for your phone. Also its the best light review channel on YT bar none
@David Needler do you know that it is you who decides what gets into your life and onto your screen? I have four computer-like devices, but I use them to watch educational videos and to watch adult videos. Why do you have to watch those things which are not "peace and quiet''???
The same app on Android is alled Photone it's free and u don't need to use a diffuser wit the android app like u do for Apple
@@MrKush815 yes but if possible compare it to an iOS as they are calibrated from the app. My Google 6 reads identical to iOS
@@rockenuptown1 my daughter has an iphone so I'll definitely compare the two
Good to know but I don't have a iphone. I will wait for the Android version hopefully soon. Thanks for the info!
Thank You for bringing this app to our attention! I would of initially said ABSOLUTELY NOT! Would of expected huge variance coming from that app. In watching you compare to calibrated equipment, I also was astonished at the accuracy! Downloading to my iPhone today! Thank You. Subscribed!
With high CRI lighting like the one this guy is using, a simple lux meter becomes increasing useful. This will not be perfect but.....Lux divided by 54 (Sunlight, 100 cri, ppfd to lux conversion 54) multiplied by 0.9. For example, 60,000 Lux, divided by 54 = 1,100 multiplied by 0.9 = 1000. Like I said, not perfect, but useful.
That name tho 😂
Right! Feel free to download the corona/covid app 😆
The name changed to Photone now
What light did you use? Try CFL and CMH and tell us if there is a difference? Thanks!!
I don’t need to save the video or write anything down as the app name isn’t hard to forget.
Man, that's pretty killer. I just compared it to my LUX meter and it's pretty accurate. Using the lux meter has really helpled me with this current grow, but of course it would be much better with a PAR meter, but at least I can be consistent with the amount of overall light hitting the plants. Thanks for the research and for sharing. That's really cool of you.
What brand of lux meter? I have dr meter and it reads less lux than the app...
@@andrewbee82I love Dr. Meter. Didn't know they made them, but it makes sense since it is a METER! Duh! Nah, I didn't know them then. I have a good URCERI MT-912. It was $30 on Amazon and it goes up to 200k. What I use it for I don't need more than 80k. I was just thinking this morning how this thing has changed my life. It's taken a good part of guessing from the equation by being able to see the light range and dial it in where I want. Can't imagine if I had a PAR meter. It's helped my confidence because it helps me with one of the 3 most crucial elements of growing, correct? What's cool now is I can guess and be pretty accurate. It's fun.Thanks Growing Answers for covering the topic.
Thank you!!!! I was looking for a video like this for so long time!!!!!
I agree with all the other comments.... thanks for sharing this information! Makes the most out of the iphone for sure. Just what I needed at the right time. My light level was way too high!
great tip with the pvc sensor
My problem with par meters is that I have to use them with the door to the tent open, which throws off the readings, which defeats the whole purpose. So I just rely on published PPFD charts for my lamp.
Published ppfd charts are notoriously inaccurate. Measuring with the door open doesn't make that much of a difference, only a couple of % in my 4x4.
I just recently invested into LED lights this is a godsend thank you for your information do we appreciate it thank you again
Question: Did you calibrate it initially with your par meter for this video or were these tests were done from a fresh download? Also just curious if you tested with different measurements of PVC and found 1/2 inch to be most accurate. Thank you for your videos they're very helpful.
I did not calibrate it. I randomly had a scrap piece laying around. it just worked.
Thanks for the information I download the app I just recently switched over to LED it'll be nice to save a little money in the pocket on the electric bill
22 lb and 92 brightness is what you want to use.. super super accurate
With high CRI lighting like the one this guy is using, a simple lux meter becomes increasing useful. This will not be perfect but.....Lux divided by 54 times 0.9. For example, 60,000 Lux, divided by 54 = 1,100 multiplied by 0.9 = 1000. Like I said, not perfect, but useful.
i tested this app with my marsh hydro ts-1000 and their webpage says that it gives 626 ppfd from 30cm at 50% luminosity and this app gave 620 without any calibration. i'd say its accurate enough to get your lights fixed for your grows.
@StuffintheMuffin without. I think its only required for certain phones. Phone i used was OnePlus 9
Great tip man, thanks, saved me a lot headache asking those sellers for light specs :D
works like a charm :-) ty
ok now one additional comment on the piece of tubing i did a little messing around with a couple sizes of the pvc tube and because the inside is bright even with the paper over the top what in affect happens the inside of the tube reflect some light down and into the lens of the camera and different size tubing did make a slight change the readings under a couple lights i have. so using a 3/4 pvc 1/2 inch long with white paper super glued to end, i have a case on phone so had to modify one edge of the pvc so there is a minor step in it and taped over it with black electricians tape so no stray light can get in from under and now i can can set the tube with paper dead center over the camera lens.
so here was test i did 9 inches from face of phone to face of light
i have full spectrum white led light i made 2x4 feet in size with 2:1 3000k red / 5000k blue888 total LED's. running two mean-well 100 watt power supplies total watt draw on killa-watt meter at 209.7 ( that includes the draw the mean-well circuits draw ) . manufacture of LED total draw of LED should be at 177 watts grow area is just slightly larger then light 28x54 inch so results-
center of light , using the led full spectrum setting
pvc places on camera 337 ppfd
pvc with notch - centered 346 ppfd
at extreme corners
pvc placed on camera 144ppf
pvc with notch - centered 155 ppfd
so .7 to 1.6 uj /w depends where you read
myprintscreen.com/s/1605107714.57238809.png
Very clear sir, thank you for your advice at first I didn't know what I was looking at now I am going to watch the video again lol
you have made my day. For the right distance between my plants and my led lamp thats perfect.
The issue I have here is you keep using the term calibrated. Without having a standardized source and the ability to adjust the sensor on the iPhone you are not calibrating anything. Unless you have a real PAR meter to validate, this app is useless.
The app is pre calibrated with various light sources and can be further calibrated if you have a meter like I do. It’s instructed with the app on how to use it. It’s obviously not useless as I demonstrated. And I stated also that’s it’s not going to replace a true meter, but it works well enough for those who aren’t needing that level of accuracy.
@@GrowingAnswers different digital cameras have different properties to their image rendering. look up fpv camera comparisons, it's literally night and day with some. The app is calibrated for the raw input I imagine, but the raw input without custom calibrated driver can make the results vary between different smartphones.
As I started to go down this Rabbit Hole using Google, I came across a $200 PPFD Bluetooth device from a Chinese manufacturer. Called a "
HPL200P 400-700nm Quantum Par Sensor PPFD Meter umol/m2/s" But I couldn't find anything other than a Korean video, and a clip on the seller's page on Ali. The presenter does attempt to present in English, but the phone screen seemed to be just showing Lux and Footcandles on the Android App. But they also sell a Lux only version called a HPL200 so maybe that is what they are showing. As much as I'd like to try the PPFD version, it would certainly require finding a bit more info, that's for sure. Hopefully someone will be able to chime in with more info at some point.
Thanks , for 5.00 can't beat it... FYI , all you need is a 1/2 pvc cap and cover camera no paper
Excellent!! 🤘you dude, just made Photone extremely valuable to me. Thanks so much my friend.
Cool. I actually tested it in Moonlight and found it to be very accurate. To wear a regular lux meter couldn’t even measure it
Problem is the app only makes estimates since it doesnt even havw sensors capable of detecting 660nm..so most apps just add 10% which you can see can thrhow things off majorly depending on how far or close the light is or spectrum. For example photone + ppfd meter app almost off nearly 200 par ppfd at canopoy level for a led light with 20-30% red spectrum . It does get more accur4the fuether away but still this all depends upon your led . People who keep quoting migro video as holy grail have no idea
Liked and subscribed, best explanation of the app I've heard so far. Thank you for the video brother!
It went to 872 when you backed away brother!
I said same thing, it was him blocking the light from the app lol
Uhhh each light is a different in app purchase so to suggest that it is free or that you don’t need a add on is not true
Apps keep getting better, and will expect soon that there will be more. Never heard about this one until now. Thanks for demonstrating. Would be irrelevant without the Apogee to compare against it.
Thanks nice hack for the diffuser
Should mention it costs per light you want to unlock using combinations of lights makes the app costly to use better to use a meter
Don’t download if your trying to test led. That’s the reason why this gentlemen purchased the premium versions. You can only test cfl with the free version pretty much. I’m uninstalling right now!
Lol. You can use “sun” mode to test led. It’s close enough.
Can you try it outside ? Please
I brought the app because of this video. Using it with a 600w MH bulb and it seems pretty accurate. You have to pay $4.99 US for the MH bulb spectrum but it’s worth it. My plants are always praying. I also use a clear/blurred piece if 3mil plastic to cover the sensor on my phone instead of white paper
Doesn't exist for GooglePlay? 😢😢😢
I'm trying to test the fc-3000 as well but don't want to spend 600$ to do it lol. Good info.. just trying to get an idea of hanging heights and how much to dim with the fc-3000 for veg/flower.. I'm coming from CMH/HPS set ups.
Great video, extremely informative and helpful. 👍
Im here to measure my reef tank lol, i think everybody want it so much. This is gold man
You just saved a new grower so much money
Wow just watched and bought the 5.99 version really cool !
Hi only recently discovered and subbed your channel going back to the luxmeter hack you showed to measure par will it with with hps many thanks for your time and effort
Dude! DUUUUUUUUDE!!! This is awesome! Many tanx!
My guy! this is amazing thank you!
That’s a sweet ass App. Need to buy the LED and all other lights. Gunna need a little tube thing for the camera like in the video 😅
For anyone looking at this post Covid. They changed the name of the app to Photone Grow Light meter . You can see they didnt change some of the description and you can still find traces of korona name. Thats was a very sad choice of a name for what seems to be a great app. omw to try it out :)
But do you got a screen protector on your iPhone . The app says it can effect the reliability.
But can I get the data extracted to see a spectral range ?
Exactly. I've seen Shane, of the Migro light channel, using his smartphone to show the spectral range, as well as any other info available. It's very impressive!
I believe it may be an app that's available with The Apogee Meter?
An app showing the spectral range alone would be great. I search every once in awhile, but haven't checked lately. I haven't tried the Tent Buddy App, or the ppfd meter app, mentioned in the comments, though.
Please let us know how comparatively accurate this is in outdoor sun! 🙏🏻
It looks like the app is called Photone, today
You've made my day mate cheers
hey man, awesome app. you should really mention that its only for apple not android. I looked for it and still cant find the thing lol. Oh well. awesome app for you though.
I guess there's no version of the app for my Samsung phone.
Sweet! Good looking out!
Good effort mate!!
I reckon when you stepped back though the Apogee did go to 874 which is freakn close to the phone. Wow
Excuse me, which paper did you say you used? I tried with 90g one, and it still didn't provide the right results. I have a light meter and a PAR meter and I'm trying to get the diffuser right. I've tried different types of paper, tried folding multiple times, but it's not working out for me
20 weight 8.5x11” printing paper
@@GrowingAnswers Thanks! I'm using 24 weight one, and the values are more than double what they should be. I'll try finding 20 weight.
Hi again. I love the lux meter apps....I wanted to ask . Can activated or partially activated worm tea in the fridge?:)
maybe it is not a good idea. the lack of oxygenation could encourage bad bacteria to start growing or something. but perhaps because of temperature an lack of light this might not occur as quickly?
you just saved me a ton of money thank you
Where i can Download this app? Thanx for the link!
Just FYI, the Korona app is now subscription based and you have to pay $5 per light type you want to measure. Still worth it though.
Thanks for pointing this out! But also mind it is ".. subscription OR $5 per light .. " :)
The android beta version is 100% free now.
Loved the video bro subbed, def useful demonstration, do you know of an accurate par level meter app for us andoid guys?
I don’t have anything Android to test.
So Apple will know, where all the hydro does grow🤔
Not even bcuz I need this and I grow fruit
Haha how tight is your tinfoil hat?
@@plainandsimple6346 tighter than your girls pum pum😭
Ewe huemans should be aware...
@@plainandsimple6346 cliché clone...
Have the free version
Was curious to watch your vid to see if I want to upgrade to pro
wow, you deserve a subscribe for this, cheers!
What kind of smartphone do we need to take the measurements? oDo those have an specific light sensor?
Too bad their pro version is subscription based instead of a one off fee. Would've bought it otherwise.
No it’s not 💯🤷🏾♂️😆
I don’t know where you found it but it sure don’t exist anymore on the iPhone
It absolutely does
You should do Android apps too...and propose recomendations :)
I don’t have android based devices.
"Tent buddy" or "ppfd meter - plant grow light meter" on android
I can imagine reliable lux measurements but how the hell can it measure par? Especially on anything that isn't full spectrum?
It figures out the color temp and multiplies lux times a conversion factor
Most of the time it's around 0.02
What about android? it says the android app does not need a defuser
Not for Lux or color temp. Is needed for par
Thanks for sharing! Love your channel. If you hear of a Android app could you do another vid? Thanks!
Hopefully, you've checked the comments section. There are 2 apps available for Android. "Tent Buddy", and a "ppfd Grow light meter", or similar.
I'm going to check them out myself. Several mentions in the comments.👍
Nothing is free, if you're not paying for the product, you're the product.
did the blue Java fruit for you yet?
I bought the app and its okay i guess but there’s still not enough info out about it. Can you do another review on the same app but raise and dim your light, live, so we can see how it compares next to the Apogee. 🙏🏽🙏🏽🙏🏽
All the comparisons were done at different heights and different intensities.
@@GrowingAnswers Yes I saw that but, as you’re recording, can you manually turn the dim knob to show how well its tracking, live, compared to the Apogee?
Aw dang only on apple
sometimes the algorithm saves you 700 dollars, thank u youtube and thank you growing answers!
You could screen shot your phone so we could see without you covering the light
Wow!! Had the Korona app for a while, but didn’t seem accurate. I adjusted the par level for lettuce under a spider farmer light and it seemed way to bright and burned up my lettuce. Now I see you need a light diffuser and it makes it accurate. What diameter and length is the piece of pvc? Thank you so much.
1/2”
Thank you. I will give it a try.
Does your phone have to be playstationary to use the app along with the paper
So dose this work on all apple phones or particular models
Can you please suggest a measurement lux reading setting for gaming and a lamp and color temp Lux suggestion for long bouts of gaming or studying and also for late night studying? I know totally off topic but your video is super cool and been playing with it and test lighting everywhere I do my reading. I’m also tempted to grow tumeric for my wife and some plants cause of your video. Can you suggest a book on plant veg grow with lux and color temp and light fixture suggestions? Thank you kindly! Subscribed! Do you do any reviews or suggest a cheap Chinese par meter?
just use a cheap lux meter. I talk about them in other videos
@@GrowingAnswers any books ?
@@avia4281 I just read articles and such. No books.
Do you know what phones it works on
Did you calibrate the app before you made the video? If so, how far apart were the readings before calibration? I think people that would download and use this app probably do not have an actual PAR meter to calibrate it with.
I did not calibrate it.
Not available for Android?
Could you test with white plastic cap from a luxmetter please ? When I do I have twice de values than with paper (not sure I have the right thickness for my paper)
Are rollingpapers suitable?
What is the name of the AP? CORONA ? Not surprisingly, my search in the Apple store brings up tons of apps, but nothing remotely close to a meter of any kind type of app. Am I searching with the wrong name?
nvrmnd. Found it ;)
How accurate is the sun light compared to the full spec led when measuring ppfd under an led light? Is it worth it to purchase the full spec led option?
It’s close enough
@@GrowingAnswers thanks for the reply!
The LED extension is well worth the few bucks it costs. The app is free, you pay less than $5 for the LED option. Just throw the developer a bone... his app is worth $5. Paying encourages people to make great software like this!
Thank you!