Week4@inCharge
Well-Known Member
I had to edit that last post.. I just looked at my notes on the LUX calculations and it was pretty dam close.. crazy.
Any recommendations for a par meter
- Thread starter MrStickyScissors
- Start date
chronnie49
Well-Known Member
How were you calculating par using lux? I take lux and multiply by .015 but maybe there is a better way i don't know about.
Week4@inCharge
Well-Known Member
Look for the kelvin of your led setup (I'm just assuming you have a led lighting kit here) and choose the corresponding HIGH CRI LED for calculations from this site. It's dam near accurate.
Convert Lux to PPFD - Online Calculator | Waveform Lighting
Online calculator to convert illuminance (lux) to PPFD (micromoles per second per meter squared).
Lenin1917
Well-Known Member
If you have a newer iPhone the Photone app is really accurate, doesn’t hit extended par ranges like far red/ir but thats just a little math.
migrolight.com
PAR meter APPs tested & compared for accuracy
Can smartphone PAR meters measure accurately? There are a number of smartphone apps which claim to allow you measure PAR (Photosynthetically Active Radiation), the wavelengths of light that grow plants) turning your phone into a Par Meter. An accurate quantum sensor for measuring PAR cost over...
migrolight.com
Lenin1917
Well-Known Member
best $6 I ever spent
bk78
Well-Known Member
Not accurate on my iPhone 12 Pro at allIf you have a newer iPhone the Photone app is really accurate, doesn’t hit extended par ranges like far red/ir but thats just a little math.
PAR meter APPs tested & compared for accuracy
Can smartphone PAR meters measure accurately? There are a number of smartphone apps which claim to allow you measure PAR (Photosynthetically Active Radiation), the wavelengths of light that grow plants) turning your phone into a Par Meter. An accurate quantum sensor for measuring PAR cost over...
LeastExpectedGrower
Well-Known Member
Looking forward to testing the Photone app (iPhone XS + a couple different diffusers) against the Phantom meter, but UPS just changed my tracking from 'delivering today' to SEVERE WEATHER DELAY with no date.
chronnie49
Well-Known Member
The numbers are almost the same using that calculator as they are multiplying by .015 so that's good to know. Par is 800 with the calculator and 750 when you multiply.Look for the kelvin of your led setup (I'm just assuming you have a led lighting kit here) and choose the corresponding HIGH CRI LED for calculations from this site. It's dam near accurate.
Convert Lux to PPFD - Online Calculator | Waveform Lighting
Online calculator to convert illuminance (lux) to PPFD (micromoles per second per meter squared).www.waveformlighting.com
Week4@inCharge
Well-Known Member
hate when that happens! hope you get it sooner than later.
LeastExpectedGrower
Well-Known Member
I mean, given that I didn't even expect or intend to buy it until this past Tuesday, I can't really get too worked up about things, but I was hoping to spend some time measuring and comparing this weekend (removing plants from the tent, measuring from heights and different brightnesses and all), so it'll have to wait until mid next week or next weekend.
bk78
Well-Known Member
Interested to see how the iPhone XS reads compared to my newer sensor I tested. My was pretty consistent at around 100 ppfd off from my pulse and photobio
LeastExpectedGrower
Well-Known Member
Yeah, me too. I wish I had a decent & calibrated Apogee to test against too, but whatever. No place locally that rents them or anything. Though at 'consistently 100ppfd off,' it would be fairly easy to calibrate to that. Assuming I find both reasonably close to each other I'd probably calibrate the Photone to match and then use both in different ways. Super convenient to just grab my phone, set it for DLI and spot check every once in a while.
DoubleAtotheRON
Well-Known Member
You get your Phantom meter in?
LeastExpectedGrower
Well-Known Member
It literally JUST arrived moments ago.
People weren't kidding when they said this feels cheap...Certainly is super lightweight and plasticy. I hope they spent on the sensor and electronics and saved on the cases... Tonight is a feed night for me, so once the lights come on just after 5 I'll do that and do some test/comparisons.
DoubleAtotheRON
Well-Known Member
Cool... it'll be interesting to see how your comparison is to BK's... I know in the instructions on the app, it says to use a certain weight of paper for the diffuser, and I believe you guys are using different phone models... I'll be tuning in!
LeastExpectedGrower
Well-Known Member
I had to dig out an old Samsung Galaxy tablet from my road gear to find a something with a camera, since my phone will be busy.
Luckily I had one that I used to use for IEM mixing on stage that is just sitting around these days.
DoubleAtotheRON
Well-Known Member
I think I'll reach out to some locals to see if they have an Apogee or PulsePro, I'd like to compare them myself as well. Im using an iPhone 13
Week4@inCharge
Well-Known Member
The one thing I wish the Apogee had.. that DLI. Gonna calibrate the Photone later on... or try too..
I was up early rearranging pots and couple lights for the optimum spread of light,
LeastExpectedGrower
Well-Known Member
Yeah, shortly (like in about 15 minutes)...I'll stop being lazy and get down to the tent for feed/inspection & lighting fun. My tent is pretty small (60" x 32" x 80") and I've got 3x HLG 225's which are supposedly good for 2x2 or 3x3 strung across the 60" width, so there's really no serious 'dead spots' in the tent.The one thing I wish the Apogee had.. that DLI. Gonna calibrate the Photone later on... or try too..
To test the meters, I'll unplug 2 of the 3 and get out the tape measure and use some boxes to get reasonable measurements at the usual distances. Once that's done, I'll plug everything back in and do some PPFD/DLI measurements at canopy levels and let 'em ride.
Week4@inCharge
Well-Known Member
Just finished a quick comparison between the Photone (android) app and the Apogee. I loaded the Photone app to another android phone I had laying around (LG) and long story short, it's not reliable. Even after a calibration. For one spot after calibration it did good, other areas of measurement off the Photone app were not even close though. 500 PAR measured on the photone app was 800+ on the Apogee. The Photone app for Android is still in beta so maybe they'll fix something later on. The lUX meter to PAR calculation (using the website link above) is much more reliable than the Photone app. If your on an iPhone you might have a totally different experience. My 2 cents..