LUX vs PAR Meter | Can You Use a Lux Meter with Grow Lights?
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- Опубліковано 15 жов 2024
- In this video I show the difference between using a standard light meter and a quantum flux par meter.
Can you use a lux meter to measure grow light intensity? YES and NO. Lux meters test mainly the green part of the visible spectrum and therefor will not give a consistent readout between various types of grow lights. PAR meters test the entire visible spectrum and can be used to test any type of light so long as you use the proper model and is a reliable brand.
How to calculate PAR with a lux meter - • Calculate PAR With A C...
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UA-cam is the greatest library on earth. Watched like 30 videos on grow lights so far and learned a huge amount of information already.
Hours spent googling and every question I had was answered here in 12 min...thank you
same
I love how you back everything up with examples, great video explanation
All I've got is one of those 3 way light/moisture/pH meters. Lol
That was helpful comparison info. Thanks. (I just got a TS1000)
Does that shit work bro
@@weedweed723 The light meter gives a vague idea. Moisture and pH seem to work fine.
have been growing bonsai tree's under lights for 35 yrs. and this free par meter would be an asset for sure
I would love to own the hydro farm Par Meter. Love your lectures.
How many lux or watts does a grow light put out
Great video brow, very grateful for it! You should do one comparing the par meter measurements for different color led's, 2700k, 3500k, 4000k, 6000k. People would literally kill for that info on indoor grow forums lol
Thomas M Galt see link in description
You answered all my questions rapid fire and I loved it! Thanks.
For WHITE LEDs just multiple your lux meter reading by 1.5 and you will get almost spot on "PAR" reading. You can check this on many other videos. On this video you have 332 lux, multiple it by 1.5 and you will get 498. Almost spot on to 507 value .
allthesecontinents I’ll try that
Iv been using the lux meter and thought I was doing it wrong but your comment it right
@@sk8ercory94 this is valid only for "full spectrum" (white) LED's.
That's 33200 lux. 332 lux would be very dim.
"I want the Hydrofarm par meter"... Thank you for the chance to win. 🤟🏿✌🏿👍🏿
If you know the ratio of total lumens output to total PPF output then you can trivially calculate PPFD from a lux reading. Usually the manufacturer gives you the lumens and PPF for their product.
PPFD = Lux * (PPF/Lumens)
HLG provides a calculator online to convert Lux to PPFD for their various products.
There is even a website if you search "lumen to ppf calculator" that has common spectrums built in.
That's incorrect. It is not possible to convert Lux to PPFD absolutely accurately without providing the light source's spectral power distribution (SPD). In reality, however, obtaining a light source's exact SPD is not an easy task for the average grower - it requires expensive spectrometer equipment. It is easier to buy a par meter. Lux is still important just not to measure photo actively radiation (PAR) Peace
"I want that Hydro-farm PAR meter". I use a lux meter now for rough readings, so it would be great to have. Great video!
THANK YOU!!! Thank you for this informative video. I'm making the change from the older 'Blurple' LED to newer Quantum board 'White' light. My growing guru hydro shop owner says be very cautious with the newer light, can cause light burn if not careful. A PAR meter would be so beneficial, but beyond what I can afford. This would be a God Send for my next grow.
That orange one has foot candles also. I would love to see a quick test comparison numbers between those two.
I have a pHD in Biology and would love to have it for my classes on photosynthesis..... NY here....
How about using a Read Instruments R8140 LED Light Meter that reads in LUX and foot-candles at preset and custom set color temperatures? Wouldn’t that with spreadsheet conversion tables offer the best of both worlds?
What meter would a person use to test the percentage of sunlight coming through cloth in outdoor garden area?
Lux meter. Measure the sun then measure inside and calculate percentage. Or just subtract the difference.
Jzuz you are chiziled and.. Seriously informed. Excellent vid. Thanks!
Dang I just bought that same lux meter lol. It also measures foot candles but I think that’s also limited to human eye spectrum. So let me get this straight: Lux meter= good for measuring light for people (office/studio lighting for example), par meter= good for plants because they see and can use more of the light spectrum than we can see. Is that right?
Basically
Bro i need that so bad can please have it i love your video content & TY for you do for the community...keep making great videos...✌
So for white led, let’s say household ones, from 2700k to 6400k, is it fair enough approximate to a conversion coefficient of 0,015 to 0,017(Lux*coef=PPFD)
Could you test it under this 3 led color? It will be wanderful to have 3 coefficient for this 3 main led color. Thanks
andrewbee82 thanks. I have just uploaded a video regarding this.
I want the hydro farm meter!! And thanks man for another great video! There is a reason I subscribed to your channel and this video is a perfect example! Thank you!
"I want the hydro-farm par meter". I will give it a good home and put it to good use! Thanks for the video...😆
Great info! I'm retired & understanding the Par is going to really help. Dispensaries are just too expensive especially living on a budget. THANKS 🪴
Articulate and straight to the point. Thanks man for the video!
Question: Can I use Luxmeter to measure darkness of a room? I want to block gaps on my window blinds and I want my progress to be measurable
I don’t think it’s sensitive enough for that.
@@GrowingAnswers I thought so ~ but I tried just minutes ago seems to solve that issue. I did it during day time. I turned every electronics and lights. And measured the lux using my phone(didn't thought I can use phone before I wrote the original comment). Then I left it there for ~20 minutes to average(it averaged at 30lux). Now I just need to normalize between daily weathers to get average. What do you think about Lux sensors of phones, is it comparable to actual Lux meters?
@@ThoughtsonTwo considering meters and phones just use image sensors it all comes down to they way it’s designed and how it’s applied. A phone can only be reliable if it’s calibrated to a known source. Otherwise it can’t really be fully trusted.
@@GrowingAnswers I see, thanks for the info
Question what range should it set at I have a 400wt full spectrum led and a 200wt spider farmer sf 2000
I’m not sure what you mean. You shouldn’t have to set anything. The only thing you adjust on the lux meter is the decimal point. It still reads the same no matter where it’s set. The only thing that changes is your interpretation of the number.
HI RYAN, Thank you for being clear with your experiments of BASILIC, PEPPERS.
I appreciate your experiments. These are great videos.
I need your help, you could compare the "nutrient solution" that you use with other brands, also what "nutrient solution for soils or hydroponics" would use and in what quantities if you transplant hydroponics to cultivation in soil or pots. In my apartment I have a very small garden that is why I use more pots and that is why I am very interested in doing a pot transplant after I grew in hydroponics.
I can make high use for it don't have any but question i got a galaxy s9+ and I'm using an app is it possible to compare smartphones reading with the device you are showing just for the super budget or ppl who only have a smartphone. Please if you can present galaxy and apple comparisons against your top device
"I want the Hydrofarm par meter" I'm already subscribed and hit the bell!
Thank you very much for the quality video you are sharing.
do you have a link to the hydrofarm par meter? the only hydrofarm meter i can find is the lux meter
Have you tried the app, Tent buddy or ppfd meter. For android? How accurate is it for par, any chance you could do a video, id like to know for 450nm, 460nm, please. thanks
you could say the PAR meter measures protons, ie solid core, where the lux meter measures the light rays which are waves
Awesome video my friend...I would love to win the Hydrofarm PAR meter:)) it would suit all of my needs:))
This answer my questions. You are the man!
Hey I wonder if u know this....how wet should clay pebbles be in dwc pots in rez lid
I’m not really sure what you mean. The roots need to be wet. Not really the pebbles. If ur thinking of drain and fill systems then the pebbles just need to be wet all the time. Net pots don’t really submerse either. Just the bottom of it touches the water or is partially submersed.
@@GrowingAnswers thanks....its like the stem is in the pot and roots are outta the bottom then like 1 inch to reach water but white powdery stuff appeares in the stones after few months and if rinse it all white like talconpowder on water ...smells sweet....I kno they need a dry zone but should that be in the pot or above the stones ......cos the stones always damp half way up and roots always go into them obviously....but new ones if the stem due to wet stones. ..I mean I know one way is to have drippers on the stones :)
On the par ..on a 1000w for bloom ..how much ppfd is best
Usually 1000 µmol center par measurement is where you want it for flowering. Outside the center PAR somewhere between 700 and 800.
I saw your comment on MIGRO. It would seem that Shane is the outlier between HLG, Appogee and your measurements. HLG lists 1000ppfd as 67,000lux. Though I'm finding it very hard to reach that number with my custom HLG 550 build that has a much more even footprint over 4'x4'.
67,000 X .015 = 1005
yikes this thing is $800 in Canada, any less expensive options?
use a lux meter like the one i show
Excellent, this was exactly the info I was looking for. Thank you
am I too late to win the meter?
NO
Google "lux to par", there are calculators / conversion factors for different light sources, and they're GREAT!
Not everyone is willing to spend 500$ on a light meter
pin this comment people should know before they spend good money on a par meter
a conversion factor table is also available on the website of apogee instruments - the same company that made the PAR meter shown in this video
Was going to say the same thing. I just picked up one on amazon for 20 bucks
The calculator here for my light is spot on for the manufacture PAR footprint.
Just have to
Select the type of light you are using.
I still don’t think it will be as accurate as a PAR meter as it doesn’t measure the PAR spectrum. But as a tool for estimating I’m pleased with it
www.waveformlighting.com/horticulture/convert-lux-to-ppfd-online-calculator
The problem with those calculators is their dependent on knowing the spectrum of the light. This works very well for non led grow lights, as their technology is much older and the spectrum is far ore consistent. LED's are all over the place, and with mixed diodes putting off different spectrums this is even more true. For high end boards (samsung diodes and other high end leds) you can normally find good conversions from light companies (I know hlg has them on their site for all the various quantum boards.).
a cat it’s $600 close enough lol
What instrument would measure the light intensity (lumens/square meter) with a breakdown of the spectrum: lux of blue, lux of red, lux of green? (or mathematically segmented more precisely)?
Geezle Puss typically a spectroradiometer is used for that. Expensive
All the LED lights I've seen have their spectrum in the specs. Using either a PAR or Lux meter and that graph, you can easily get the right answer. For example, measuring the green light and knowing the red light is double the green light.
I want the Hydrofarm Par Meter.
Great information.... thanks
How many leds do I need to grow sumthing
That’s impossible to answer. Leds come in all shapes and sizes. Lights come in a wide range of wattages and various plants require different amounts of intensity to grow.
Yo man any chance that PAR Meter is still available
Available on amazon for you to purchase bud!
Good point by the way in spectrum being different and making it not a " fair test " ;))
Hi thanks for making this video but what about using a lux meter to check if your bulbs are getting old and not putting out enough basically to check if you need to change you bulbs or ballasts even
Faizah Wahab par meter would do the same thing. Just go by the hours of service.
thanks so in that regard a lux and par meter would both work for that application???
Faizah Wahab sure
This is very well done Thank You
Great video with some very useful information!!!
The free light intensity app on your phone is a lot more useful than you realize. It's not perfect, but with full spectrum LED, it does a good job.....
A Lux meter is good enough to ball park the amount of light (white light) to see if you are indeed providing enough. The difference on Amazon is about $500 US or $1200 Canadian for the PAR vs a cheap Lux meter.
Thanks for that explanation!
Would love that meter! Thanks for the info!!
I need that Hydro-Farm Par-Meter.. love the videos
I do have a huge passion for growing houseplants, but the real reason why I clicked this video is because this guy is really easy on the eyes. 😍 lol
when you use the lx1330b to measer red/blue is 15100 or 1510 lumen? i can not see it clearly
Kieng Le 15,100 lux
@@GrowingAnswers how many watt friend
Kieng Le about 200
PAR Meter Please.
THANKS for the explanation & demo...
Great video! I need a Hydrofarm par meter too!
Thanks so much I have a lux meter did not know this I would love to have a par meter that would be awesome thanks
OMG.. I really could use that meter... I grabbed a 3 in 1 at Lowe's.. and didn't even know how it measure .. it's been ok so far. But just got a new light and not so sure
Thanks for the chance to win.. I want the Hydrofarm Par meter.
I would love to win that!! I been looking to get one for a while now!!
"I want the Apogee MQ-500 par meter".
Well said and well done.
I sure wish I would have come here first... back to Amazon and thanks for experience.
Glad I watched this before I bought that…. App 😅 thanks!
I'm okay on the meter, but thanks for breaking the application of both down.
Only USA ☹️ you got worldwide subscribers brother am from India!. hopefully the next time you think of an giveaway to international people’s too 🙏🏼✌🏼
I want that hydrafarm par meter!! Please please please!?!???
Thank you sir I'm sure 😊
Now it makes sence.. thanks
Want that meter!!! Need that meter!!
Thank you so much I finally get it.
Great info 👍
"You can use a lux meter to measure distance from plants. Problem is, the differences in color temperature is gonna give different readings".... sooo??? Isnt that why MH usually runs at 400 watts and HPS runs at 1000 watts kept at the same distance? I'm not seeing where I'll run into a problem here....
Power efficency has nothing to do with reading lux or umols. thats basically what ur describing. ua-cam.com/video/aIrzWlDTtqE/v-deo.html
i love this guy.
"I want the Hydro-farm PAR meter". I have been struggling with light intensity and I think this would solve my problems .
I want the Hydro farm par meter ...pretty please ... muchos gracias
Good video , thankyou
You say the PAR meter tests "the entire visible spectrum". Why would one test the visible spectrum when we are talking plants, not the human eye?
I want the Hydrofarm PAR Meter
PAR is 400 to 700 nm or roughly red to blue light, however this is an over simplication of the radiation that plants use as they use radiation below and over this spectrum (300 to 800nm 1970s research), (Cree did lots of research on this year's ago). What it boils down to is we are still not measuring the photosyntheticly absorbed radiation properly. Reproducing the exact spectrum of the sun is required (at ground level on earth) to reproduce the radiation used by plants then taking away narrow bands of radiation to see what effect it has on plants and their growth, this has not been done to the best of my knowledge.
I want the hydro farm power meter I'm subscribed and I liked the video good info thanks
Thumbs up, good vid. I'd love to win a par sensor, thanks for the chance.
I wish you would have compared both in full sun outdoors.
I did that in the other videos similar to this
@@GrowingAnswers Ooh, youtube is slowly suggesting your content since subscribing, so one day I hope I find it.
@@lightdark00 I don’t recall which one I did that in though
I saw this video pic and was thinking what the hell do these light meters have to do with paramotors haha. Two hobbies in common
great video very informative , i would love to win the hydrofarm PAR meter
Should you introduce our GROW LIGHT METER SM206-PAR?
Is it cheap? Lol
How to contact you?@@ewreck944You will be satisfied with our price and quality
ewrecc420@gmail.com
I don't live in the US but I would gladly pay for shipping if I'm the lucky one :)
Easier way...use lux meter app free on app stores...check outside in preferable conditions and use that number as a benchmark for what u want the plants in obviously;))
have any more of those Par Meters you would like to give away?
I want the hydrofarm par meter..
Thanks for the good info. And now I just need to win ur par meter hahaha
Thanks for the video and the giveaway
@UCSP4DjMfxhO7K2KZ2wvgvUg
Im curious to see how the lux to ppfd calculators work . Care to try one out.
nice video, bro
Nice informative video - send me the Hydrofarm meter bro!!
Dude, id love a par meter. My indoor game isnt as strong as outdoor.
I want the hydro farm par meter