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LUX meter to PAR meter hack | Use a cheap LUX meter to measure PAR
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- เผยแพร่เมื่อ 6 พ.ค. 2021
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Learn how to use a lux meter to adjust your grow light height for maximum PAR: • How to setup your grow...
I test four cheap Lux meters from Amazon to see if they can be used to measure PAR (Photosynthetically Active Radiation) so you can use them to optimise your grow light setup. The measurements are compared to the benchmark quantum sensor for measuring PAR from Apogee which costs about $500. The results are surprisingly accurate.
The Lux meters were tested with the two most common spectrum in LED grow lights sold in the last few years, a 3500K or neutral white LED and a White LED with added red LEDs. Other grow light spectrum were not tested and thus hack will not work for HID or 'Blurple' led grow lights (with blue and red diodes only).
Each Lux meter reading was graphed against the benchmark quantum sensor readings. On the top of each chart is the factor to apply for each Lux meter to convert the lux readout to PAR in µmols/m²/sec.
For example if you are using the UNI-T lux meter and you have a white and red LED grow light you multiply the LUX readout by 0.017 for the PAR equivalent.
Lux meter specs:
Light meter AP-881E light meter for plants Illuminance meter Lux meters with Display 3999(Range from 1～300,000Lux
Mastech MS6612 Lux 1 to 200000
Uni -T UT383 Lux meter
V resourcing Lux meter 1 200000 lux
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I was trying to get my hands on a decent sensor 6 months ago to do this very project. Thank you for doing it and putting it out there for us. As someone who has worked in production I appreciate the amount of effort that goes just into production. You've gone way above and beyond here!
Thanks for this info. Absolutely priceless for the passionate, broke home growers.
You talking about me? Lol
Me too.....😭😭😭
@@420fan2 Do you have any change you can spare?😭😭😭
@@ashleyember6822 I'll trade you quarters. Lol
@@420fan2 OK sure,I have one 2018 quarter and a "rare" 2002 quarter.would be looking for something Xtra for the latter!😳
As usual, Shane comes in with the crucial knowledge. That along with how he has figured out the conversion multiplier for each is a breath of fresh air in a world that gives benefits to swindlers. I appreciate your assistance in helping me chart out my lights!
thank you Shane! this is far more accurate way to measure the light then using the phone app.
That will make me buy a lux meter for the next grow. Thanks for sharing all your research Shane.
You can download a lux phone app.... but I like the Dr. Meter lux meter for $20.
Thank you for putting in the time. My Uni-T is on its way
Very useful for DIY led projects as long as they are 3500K leds. This way we can measure see how the ppfd charts compare to other store bought products. Thanks!
The amount of work you put in in regards to lighting is incredible. Thank you for all your hard work to bring us this information✌🏽❤️🥃🌳
Awesome thank you so much for your time. This information is really appreciated!! Nice you included the led with red leds as well the number for the AP 888 IE has changed from 0.022 to 0.028. Look forward to the next averaging video thank you,!!!!! Be blessed!!
Thank you so much Shane this information is so helpful I am now ordering a lux meter
Great info! Can't wait for more. Great topic Shane!👍💜🙏
Thanks .. I have exact the same Lux meter .. AP- 881E . But with the Photone App with Selfmade Diffusor you have the same values and you don't have to convert anything, works great 👍
You make a nice content 👊🙏
Really waited for this. Thanks
Always coming with the best info for us home growers! Thank you!
FYI TO ALL::::::: YOU CAN RENT PAR METERS. I rented mine from a "large 'blue and white' hardware store". 30 bucks for 24 hrs.
Doing right by the community with every nugget of information you share. Cheers
Thanks! Realizing that there is any common denomination whatsoever means I don't have to buy a par meter. I wouldn't anyways, it's not my first rodeo. Everyone fails the first year, too much water first run, too many nutrients for the second, etc.. After that, if you don't have lighting figured out? Go outside or keep buying everything that sellers sell.
I would respectfully disagree. Not everyone fails their first attempt(s).
@@Industrious420 Let's define failure. Failure imo is any yield less than the maximum the light can produce. A lot of growers, I'm not including you, get bud and they think they're winning. Are the colas 18", dense, with one in every trellis hole? Those are some of the things I look for in not failing.
@@yesicanu for a new grower getting a plant to harvest that you can smoke & gets you high is a success imo. I can't speak for everyone but I just grew for the first time in my life and pulled 26oz of very smokeable bud from a 4x4 with 3 plants.
@@Industrious420 Yeah, we just come from different camps. They guy who taught me to grow was a bit of a perfectionist with one standard. Congratulations on your first grow, that's a good yield. I hope the rest follow suit.
@@yesicanu I frequent a lot of forums. I did a ton of research and dove in head first asking questions. I get what you're saying usually the people that do well are perfectionist type personalities. And thank you! I was super excited and am already looking forward to correcting a few things on my next run
This is great, thanks ever so much. I ordered the Uni -T UT383BT Lux meter w/ Bluetooth which has the lux to par app for my phone.
I'm amazed at how close the UNI-T UT383 is! I'm going to have to pick one of those up.
Gracias de nuevo Shane por compartir tus conocimientos, hacer la vida más sencilla a los cultivadores y por tu trabajo, saludos desde España, eres mi máximo referente y Guru, enhorabuena por tu trabajo te deseo grandes éxitos salud y dinero
Using my Viparspectra XS2000 and my KS5000, Ive done the comparison myself, with a rented Apogee 610...and the Red Lux meter i own, not sure the brand, and yup, its within single digit PPFD readings. 👍
Very Helpful, thank you for your great work!
What if you have full spectrum like Mars sp3000? What's the best conversion rate? I assume using the 3500k +red would be pretty close right??
so this will work with a spider farmer sf4000 with your red spectrum graph ? Many thanks priceless info. new subscriber.
You are amazing. Thank you for this. All the other factors ive found online are for older led light spectrums.
You're welcome!
You are seriously the best. Thanks for this information
Hello, I wanted to ask you a question about led lights, Ppfd lux and led distance and intensity 25% 50% 75% 100% plants? Thank you
What about with the Dr. meter model? What would i multiply there for? Still tons of growers who use the modern day leds still like to use cmh for supplementary light so I think that you should at least include that form of HID.
Many thanks Shane, take care and stay safe 🙂
Shane why dont you have ppfd charts of the hps you test. Would love see spread and true comparrison
Game changing information, thanks again Shane!
Awesome info, thanks for breaking things down
Hi thanks for the conversion on the lux to par I've got the Bt--881D lux meter it looks alot like the AP- that you used should I be safe using the 0.028 × ??? For par?
How do you obtain the conversion factor in each lux Meter?
Awesome content. Have you by chance had time to do the conversion for lights that have mixed 3500k with 5k and reds? Or would it be the same as the 3500k with reds? I have the 881E lux meter that I would like to do this with my light to dial things in.
Yup the Irish great to see 🇮🇪🇮🇪💚
wow that's alot of work. Thank you!!
Thank you for sharing Shane.
It's interesting, but it will still be limited to a few spectrums. In my opinion, when you start growing plants under led, it is important to use a PAR meter. It's true, Apogee is expensive, but you can find a much cheaper PAR meter, for example, the Photobio from Phantom has a much cheaper price (about 160$), it's what I use and I'm satisfied.
have a look at the two spectral graphs these lux meters cover, its about 99.9% of all standard led grow lights, but if you have $2000 to drop on a light then another $200-$500 isnt going to matter
@@tucker2074 You say that it makes sense to overpay for Apogee? But why?
Thank you for doing this, much appreciated!
TS 1000 is considered 3500 or 3500+ red?
Strange question but if you were to hang and test an old LED television, what reading would you get? Does changing the picture on the screen produce different results? Does LCD produce a measurable reading? Great channel.
Hi migro. In the secomd chart the lux meter
Uni -T UT383 need multiply for 0,017 for ppfd. But the blue line (par meter line) and the purple line (Uni -T UT383 Lux meter line) are both exactly in the same place. And in the first chart the blue line (par meter) and the purple line (Uni -T UT383 Lux meter) are more separate than the second chart and the multiply number is (0,014) lower than the second chart where the blue and purple lines are in the same place. Is that a mistake???? Please tell me something because i cannot understand why. and make me be confused. Thanks a lot.
My interpretation is the purple line is the values given by a real expensive PAR meter in lux. The blue line is a UT383 which is very close to the PAR meter. Multiplying by 0,017 is not a error correction multiple between the lines, but a conversion factor to convert lux to ppfd. Even if the blue & purple line are exactly the same you still need to multiply by something.
Hi.Great video.I’m very new to measuring light but wanna learn.Will this work on a FC 4800?
great work, would be nice to add a comparison with HPS/MH to those LUX meters
i do this with my cell phone, and then there is another app that can convert lux to par, it seems to work for me, you just have to find a lux meter app that work on your cell phone, for me only 1 of them work. it works really good but the app crash's alot and i have to keep reinstalling it, but hey its free so whatever.
Super useful information, thank you Shane!
Thanks great info 👍
Hi Shane thanks for the video! But I’m not familiar with all the technology and the devices used to find PAR output. I recently bought the AP-881E and I’m tryin to understand how to operate the device. I simply turn it on but there is so many numbers a and stuff on the screen and I’m not sure if I need to select one of the options/buttons on the touchscreen/keyboard. So basically all I’m asking is how do find the right setting do I need to set it in a certain mode? or is it ready to go as soon as I turn on the power? And how do I covert the number it’s readin into PAR so I can see what kind of heights I need to hang my lights above my canopy. I’m sorry I’m not familiar with those gadgets and tech so bare with me please I really want to understand this cuz it’s can help my grow! Thanks for your time and knowledge!
Hope you check this out Shane .I'm wondering in a 4 x 2 foot room do you think two 100 watt led grow lights or three 65 watt grow lights . And through to harvest
I see 5 figures in the graph range (0-80000) but only 4 figures in the Uni-t meter. Can anyone explain?
What a legend!
I would suspect if using a 3100K ceramic halide the White Led +Red is probably the closer of the two?. Would love to see a comparison to a Ceramic metal halide.
What about the cheap par meter that you pair with an app.
thanks again other great video i have hlg rspec 240watt AP-881E lux meter i would multiply 27000 0.028 get par reading 756?
Does anybody know what the right conversion factor would be for the popular "Knockoff QB288" from ALi express? The ones with 32xEpistar 660nm, 4xIR and 4xUV? i guess it would also go in the x0.017 direction/devided by 60?
Thank you Very much!
I thought you could get a par reading and the multiply or divide by a number and get a Lux number.
On IG you shared a completely different datas..i bought TWO mastech becaus the only one accurate and right know i know it is not?
Hey Shane, have you tried to compare luxmeter app (Android) to how it compares to standard lux meters/ Qs? Since there is online calculators to convert lux to ppfd it wold make it even easier. Thank you
Lux meter apps for android are flawed in my opinion. The sensor range on Android phones is too variable and the apps are not calibrated for each type of phone. The iPhone lux and PAR apps are more reliable because the sensors are the same.
Thanks so much!
Contacted ECO SPEED LED GROW LIGHT, said their sendin you a grow light for testing, just out of interest to see if its any good,👍
Well done Thank you
Thank you very much
Hi Shane, I'm searching for quite a while one video of you where you showed a chart wich shows the Lux to PAR values. I remember to look for about 40.000 Lux with my Luxmeter. I cant find it anymore. Thought it is in this video. Maybe you can help me out.
Btw. thank you for your absolutely great videos, we love u Shane! Greetings from germany:)
Awesome info can apply with my flower light (hlg550v2 rpec) Hoping you will do a calculation for 3500k white with blue for my veg led (hlg 300L bspec)
What about Android and Apple phone apps I use a par meter app in the android store. It's free so I'm sure the accuracy is way off. It seems to be working
Cheers Shane.
I bought the Uni-T and AP-881E, and I've been using the conversion factors for the 3500K LED. I built a DIY set-up using 2700K bulbs. Will the conversion factor be close to the 3500K number? Or can you do calibration for the 2700K bulbs?
My guess 2700K LED would probably be about 0,018
Thanks Shane
Thanks again Shane helping us busted broke ass pot head's hahaha love you brother keep up the good work
Great info thank you
Legend
thx for that!
Thank-you!
Plz review the xiaomi light sensor
Great info could u maybe do uni-t for 3000k light and 3000k with red
Result would be very similar for the 3000K CT
Thanks!
Good job thanks
Somebody HELP! Looking for a conversion for PatinumLED 11 band grow light. P1200 model.
Thank you
Thanks man
Hey Shane, can I buy this off Amazon? Is it the same product as the one listed on the manufacturers website?
UNI-T 383 is sold direct by the mfg on amazon. I got one. Not sure about the other brands.
Hi Shane,Ive been using the AP811E since you published the hack first time.Since you tested the lumateks Zeus is that a 3500K?also when you say white light does it mean no red at all?As an example Fluence Spydr looks white but has reds, and zeus look yellow and also has reds.Thanks mate the old hack has served its purpose very well
I actually just remembered Fluence told me their Spydrs were a 4 K, does the 3,5K chart aplies?
@@pacoloose5631 just look at the spectral graph, the second chart covers 99.9% of standard led grow lights, look at your lights spectral graph and i bet its the same as the last one
Sorry Migro just got you're vid on ios 😎
Thanks nice one
It would be cool if you added a Lux meter from a cellphone app.
His previous video
looks like the unit-T is the only one that shows the actual Lumen correctly.
Hey Hey I was number 1K to like the video!!!! Good information Shane
HI SHANE
IF UR DOING THIS BECAUSE ITS TOO EXPENSIVE TO BUY FOR MOST HOME GROWERS , WHY THEN ONLLY DO IT FOR LED'S ? THEY HAVE MORE THEN PEOPLE STILL USING M/H & HPS. PEOPLE WHO ARE STILL USING HOS ECT IS BECAUSE OF $. U THINK THEY WOULDNT WANT TO BUMP UP EVERYTHING BY 60%, THEY DO BUT CANT AFGORD TO. U FORGETTING THE NORMAL BLOKE OUT THERE?
UNI T available on eBay
Hé Shane, Dirk from the Netherlands here. Love your video's. I ordered the UNI-T lux meter from Amazon to calculate the ppf. But is there a big difference if i have for example a 3000k or 3500k color temperature? Best regards Dirk.
Dirk, not a major difference with 3000K and 3500K, they well read very similar.
I have the uni-T UT383. And im very confused because in the video i see in the second chart the lux meter
Uni -T UT383 need multiply for 0,017 for ppfd, but the blue line (par meter line) and the purple line (Uni -T UT383 Lux meter line) are both exactly in the same place. And in the first chart the blue line (par meter) and the purple line (Uni -T UT383 Lux meter) are more separate than the second chart and the multiply number is (0,014) lower than the second chart where the blue and purple lines are in the same place. Is that a mistake???? More separate lines means more high number multiply for conversion. And in this case it is oposite. Do you think is a mistake???
@@ivangarcia-ph3tx the first chart is only white led and the second chart is white + red led. It is a slidely different conversion.
Ok!! Thanks a lot man!!!
@@ivangarcia-ph3tx your welcome👍
merci
should do leds n u.v mate.....its the most used lighting system that not only everyone thats just starting in growing jump tword but people that already do well with there grows are switching to leds n ect...it be sick an ever EVER HELP FULL if you listed them ...ether way thank you for all you do and done could you lest help me with the mathing system run down you used to convet them an figer out...ill post my email if so ....that y ur math ways arnt known lol its ok tho if not I do under stand fr
Would it be possible to get the factor for LUX/PAR conversion from a spectrum only? That is usually available on the manufacturer's website
OK sure.
@@ashleyember6822 I mean a general rule, not a specific one. Some way that one could take the spectrum from a manufacturer (any) and obtain a conversion factor
okay
I have a lux meter on my phone 📱
Just ordered a uni-t 383 meter, only £16, bargain.
I have the uni-Tut383. And im very confused because in the video i see in the secomd chart the lux meter
Uni -T UT383 need multiply for 0,017 for ppfd, but the blue line (par meter line) and the purple line (Uni -T UT383 Lux meter line) are both exactly in the same place. And in the first chart the blue line (par meter) and the purple line (Uni -T UT383 Lux meter) are more separate than the second chart and the multiply number is (0,014) lower than the second chart where the blue and purple lines are in the same place. Is that a mistake???? More separate lines means more high number multiply. And in this case it is oposite. Do you think is a mistake???
@@ivangarcia-ph3tx hi ivan.
The first chart(0.014) is for white LED only, the second chart(0.017) is white+red LED.
For two different light spectrums.
What light do you have Ivan?
Hi!!! I have samsung lm301b 3000k cri80. Then i have to use the first chart??? The first chart is 3500k and my spectrum is 3000k. I dont know if the factor multiply must be change a littel. Thanks.
@@ivangarcia-ph3tx yep, use the first chart 0.014, the difference between 3000k and 3500k will be minimal.👍
Ok thanks man!!!
This is half assed science.
Takes a labcoat to be full-blown huh
Lux I'm from. Scotland can you help a brother out looking for cheep full grow tent starter pack sir want do deep water culture system please gt bk to me
😎4️⃣5️⃣