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.

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).

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.

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!

Thank you!!!! I was looking for a video like this for so long time!!!!!

Liked and subscribed, best explanation of the app I've heard so far. Thank you for the video brother!

Great video, extremely informative and helpful. 👍

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.

My guy! this is amazing thank you!

You've made my day mate cheers

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)

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.

Sweet! Good looking out!

is it possible to create some iOS emulator to run this soft on an Android device, or is the problem in the lack of some sensors?

So dose this work on all apple phones or particular models

What light did you use? Try CFL and CMH and tell us if there is a difference? Thanks!!

What size pvc pipe is that 1 inch? I’m gonna try this cuz I hate having to guess the par

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!

Does your phone have to be playstationary to use the app along with the paper

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?

Amazing thanks!!!

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.

Great tip man, thanks, saved me a lot headache asking those sellers for light specs :D

Just love you dude!

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!

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.

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!

I just recently invested into LED lights this is a godsend thank you for your information do we appreciate it thank you again

Good effort mate!!

Excellent!! 🤘you dude, just made Photone extremely valuable to me. Thanks so much my friend.

you have made my day. For the right distance between my plants and my led lamp thats perfect.

Thanks nice hack for the diffuser

How i can find the app?thx

The App tells me to remove the diffuser. Why?

Hey please can anyone help me ik i can make the par reading more accurate by calibrating it with a lux meter please tell me how

Thank you!

Are rollingpapers suitable?

Good to know but I don't have a iphone. I will wait for the Android version hopefully soon. Thanks for the info!

can you tell me which grow lights you think are better for indoor grow, led or cmh lights

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

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.

great tip with the pvc sensor

Where i can Download this app? Thanx for the link!

But do you got a screen protector on your iPhone . The app says it can effect the reliability.

Can't find that app on Android

Loved the video bro subbed, def useful demonstration, do you know of an accurate par level meter app for us andoid guys?

Not available for Android?

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.

Hi again. I love the lux meter apps....I wanted to ask . Can activated or partially activated worm tea in the fridge?:)

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

So, if i use the blurple led light, i need to purchase led red / blue option right? But i still a lil bit confused about this, do i get this feature forever or it's just short amount of time?

you just saved me a ton of money thank you

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

Anyone know why I can't find this app on Google play tried korona and photone can't find anything ?

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

Wow just watched and bought the 5.99 version really cool !

Im here to measure my reef tank lol, i think everybody want it so much. This is gold man

Doesn't exist for GooglePlay? 😢😢😢

Wow that's awesome

Would this work well if you are testing HPS lights or only LEDs with the sun setting? I know app has HPS option but you have to pay for it

Did you pay to unlock led or use it on the free sun direct mode? Will it still be accurate if use the free option?

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

Using the app- when do you consider the plant leaving the seedling stage to the Veg stage?

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.

Have the free version Was curious to watch your vid to see if I want to upgrade to pro

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?

Can you try it outside ? Please

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.

Thanks

if I use regular leds lights, some day lights and some warm lights ill have to buy the led full spec pack?

do you mind if I ask you a question with regards to this application, I've never used anything like this and I would like to purchase something and I was thinking about the Apogee mq500 but it is extremely expensive, the would be ideal. Will this at work with MEIZHI LED Grow Light, I'm sorry to ask you this question but I cannot find any answers anywhere and it seems that you are extremely knowledgeable in this matter I would just like your opinion please.

I've been reading and reading and researching for days and can't wrap my head around this... could anyone PLEASE tell me how I can use this to get an actual little graphed readout of the light spectrum and levels (isn't that what a PAR reading is??) Like the little rectangle box with the full color spectrum reading you see when buying lights..

What about android? it says the android app does not need a defuser

Please let us know how comparatively accurate this is in outdoor sun! 🙏🏻

Will this app work for saltwater aquarium lighting using all actinic blue LED lighting?

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

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 😅

How can you calibrate it without a reference? Is there any trick that does not require a $500 PAR meter first!

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

I will buy this immediately if they bring it to the google play market

so with the free version.. you do not get the LED calibration options for free.. you only get the first three (sun, CMH, and CFL).. which one would be closest to the full spectrum LED calibration option? I primarily use warm/cool LED lights to grow my lettuce. Thanks.

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.

But can I get the data extracted to see a spectral range ?

Thanks for sharing! Love your channel. If you hear of a Android app could you do another vid? Thanks!

It went to 872 when you backed away brother!

Hi 👋🏻 do you remember me (I inspired your video about conversion factor btw par and lux 😉). I’ve noticed that korona reads 25% more lux than dr meter lux meter.... now I’m way to confused. Where Dr meter reads 15klux, korona reads 20k lux... So if the conversion from Dr meter was right why now it seems wrong? Can you make a comparison with Dr meter for lux, apogee for par and Korona for both? Thx

Cant find this app in google play store, is this only for iphone? How do you spell the app?

So how much more accurate was it with your half inch piece of pvc on it? Thanks

great!

That name tho 😂

You just saved a new grower so much money

Do you know of any equivalent app on Android?

very cool

I don’t need to save the video or write anything down as the app name isn’t hard to forget.

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?

22 lb and 92 brightness is what you want to use.. super super accurate