Opple Light Master III (G3) discussion thread (Cheap device for measuring Lux, CCT + CRI)

[cannga]

Just want to confirm that Opple Pro/Series 3 is once again available. I ordered from the official store on Aliexpress and it took a mere 10 days (!) from China to my house in LA. It’s brand new and working as expected.
The 1lumen review Cheap device to measure color temperature of light / flashlights (Opple Light Master 3 PRO ) is a good read on how to get started. Make sure you turn on “location permission” for the Opple app on your cell phone.
And this is the site where you calculate Duv Calculate Duv from CIE 1931 xy coordinates | Waveform Lighting

If you’d like to get one, just make sure it’s the item on the right side of the 2 pictures on the web site https://www.aliexpress.com/item/3256803116495145.html?spm=a2g0o.order_list.0.0.4f2f18026hLcUc, where under “Color” it will say Pro (please don’t ask me why it’s under “Color” lol ). The other way to tell is of course the Pro is more expensive, ~$40.

[ChibiM]

Cool, thanks for confirming that it's the PRO / III

It looks like they shipped the EU version (III) instead of the PRO version (which is the same, but different packaging)

[cannga]

Does anyone ( @jon_slider ?) have Opple reading of Nichia 519a 4500k’s Duv (before dedoming)? All my other Nichia LEDs’ numbers are fairly consistent with known specs, except the 519a is unexpectedly giving a negative Duv even with several rounds of testing. That surprises me as numbers from Simon/Convoy indicate it “should” be positive.

OTOH looking at the color of the chart below, it does seem consistently accurate to what I see. More yellowish than magenta’ish and hugging BBL closely.

519a 4500k

219b 4500k For Comparison

Beamshots of the LED’s
! !

[jon_slider]

the white numbers are my Opple
the black numbers are a different persons Opple
.

you can see his domed 4500K measured much lower than mine…

he did not share a photo of the beams he was comparing

I agree your sw45k values are in the ballpark, Ive seen 80-120 depending on the DBin… aka D180, D200, D220 (less pink more output)

and I dont think your –0.0018 is necessarily wrong… LEDs vary… so do our measuring techniques… higher output has lower DUV… etc

here is one of my domed 4500K that measures almost identical to yours:

[cannga]

@jon_slider

the white numbers are my Opple
the black numbers are a different persons Opple
https://i.imgur.com/F7zLFeP.jpg.

you can see his 4500K measured lower than mine…

he did not share a photo of the beams he was comparing

Ok thanks - consistent enough.
I’m getting Duv range for 519a from ~ –0.0019 to –0.0044.

[contactcr]

@cannga

Does anyone ( @jon_slider ?) have Opple reading of Nichia 519a 4500k’s Duv (before dedoming)? All my other Nichia LEDs’ numbers are fairly consistent with known specs, except the 519a is unexpectedly giving a negative Duv even with several rounds of testing. That surprises me as numbers from Simon/Convoy indicate it “should” be positive.

OTOH looking at the color of the chart below, it does seem consistently accurate to what I see. More yellowish than magenta’ish and hugging BBL closely.

519a 4500k

219b 4500k For Comparison

Nichia 519A

Put 3x 4500K (from Convoy) into Carclo narrow optic (med/high-ish) settings: [image] [image]

Nichia 519A

non-scientific: 519A from Convoy w/ Carclo frosted TIR 4500K, dome on, 300mA: [image] 4500K, dome on, 1.0A: [image] 4500K must be the runt LEDs that don’t bin as 4000K and 5000K I mean who actually wants this CCT in reality?

You left out some info which generally effects measurement of LEDs quite a bit: tir optic/reflector/bare led? what current are you measuring the LED at?

Without that info your measurements are close enough to my own (also from Convoy) to be believed.

[FBsLights]

I measured a 519a 4500k w/ dome from Convoy on my Opple.

This was with 3A of drive:
CCT: 4416k, duv: –0.0081

FB

[FBsLights]

Should have also said…

At 1A drive:
CCT: 4515k, duv: –0.0020

Measured on Opple.

FB

[cannga]

@contactcr

You left out some info which generally effects measurement of LEDs quite a bit: tir optic/reflector/bare led? what current are you measuring the LED at?

Without that info your measurements are close enough to my own (also from Convoy) to be believed.

Thanks - good points. I tested with Sofirn clear optic but didn’t think about bare LED. Now that I know what’s involved, will be more complete next time.

519a 4500k in Convoy S21D with Sofirn Clear Optic (the OEM frosted optic’s numbers didn’t change much). Tested at center of beam.
100% Brightness: Duv –0.0037
20% Brightness: Duv –0.0019. Other runs ranging –0.0020-0.0030
CCT similar to yours ~ 4100K

@contactcr

non-scientific:

519A from Convoy w/ Carclo frosted TIR

4500K, dome on, 300mA:

4500K, dome on, 1.0A:

4500K must be the runt LEDs that don’t bin as 4000K and 5000K I mean who actually wants this CCT in reality?

[contactcr]

Need to include if this is with a reflector, optic, or bare LED.

For example, a reflector will typically be higher Duv and CCT than a TIR optic.

As drive current increases you will also see it trend lower in Duv and higher in CCT.

[cannga]

@contactcr

Need to include if this is with a reflector, optic, or bare LED.

For example, a reflector will typically be higher Duv and CCT than a TIR optic.

As drive current increases you will also see it trend lower in Duv and higher in CCT.

By this you meant as current increases Duv is less negative, heading towards positive (becomes more greenish etc.)?

Thanks everyone for the helpful info.

[contactcr]

@cannga

@contactcr

Need to include if this is with a reflector, optic, or bare LED.

For example, a reflector will typically be higher Duv and CCT than a TIR optic.

As drive current increases you will also see it trend lower in Duv and higher in CCT.

By this you meant as current increases Duv is less negative, heading towards positive (becomes more greenish etc.)?

Thanks everyone for the helpful info.

More current, more negative. (Less green)

[cannga]

@contactcr

@cannga

@contactcr

Need to include if this is with a reflector, optic, or bare LED.

For example, a reflector will typically be higher Duv and CCT than a TIR optic.

As drive current increases you will also see it trend lower in Duv and higher in CCT.

By this you meant as current increases Duv is less negative, heading towards positive (becomes more greenish etc.)?

Thanks everyone for the helpful info.

More current, more negative. (Less green)

Thanks.

I like it that your ArgyllPro reads R9. Is this the one you have? Amazon.com

[jon_slider]

@cannga

reads R9. Is this the one you have?

more options here:

List of spectrometers: to measure CRI, etc

Xrite i1 studio , Colormunki photo , i1 pro. Used with ArgyllCMS (free, Windows, Linux, Mac, command line) (there are other supported spectrophotometers listed but I’m not sure how common they are), ArgyllCMS pro (100$, Android), or Babelcolor CT&A (125$, Windows, mac, only i1 pro). I have a i1 studio, paid 350€ new, but they are discontinued now, like the Colormunki Photo, the other day one went for 101€ + 20€ shipping from Italy on Ebay . They are more common on the US second hand market, He…

[contactcr]

@jon_slider

@cannga

reads R9. Is this the one you have?

more options here:
List of spectrometers: to measure CRI, etc - #3 by thefreeman

I have the old colormunki photo from this link. I got mine used from ebay. AFAIK it’s the cheapest way to get a real spectrophotometer. However once you see the cri and spectrum of a specific CCT of LED the opple seems to give you a ballpark of everything else that varies more.

[jon_slider]

> colormunki

far superior to Opple as colormunki has full CRI data, including CRI R9 and R12, and is more accurate overall.

but afaik, colormunki requires pairing with a computer and special software… Probably good for people that use PCs and command line interface… I dont know if it runs on a Mac…

Correct me if it runs on a GUI…

[contactcr]

@jon_slider

> colormunki

far superior to Opple as colormunki has full CRI data, including CRI R9 and R12, and is more accurate overall.

but afaik, colormunki requires pairing with a computer and special software… Probably good for people that use PCs and command line interface… I dont know if it runs on a Mac…

Correct me if it runs on a GUI…

I use ArgyllPro app on Android but it’s a $99 app and there is no iPhone version.

However, it plugs directly to phone and allows me to walk around and the app has everything I care about in one screen.

Ymmv very niche app

[Correllux]

Looks like Opple is having significant difficulties in manufacturing these units now. I’m still not a fan of these and think it’s a little disappointing how they have been embraced so much lately in published reviews, etc. without good (more accurate) references with equipment that doesn’t have the same shortcomings, and/or clear disclaimers in the reviews about the source of the graphics/data and the inherent potential for errors therein.

But……did notice this statement on their aliexpress listing. Seems they are considering a Gen 4 unit and are asking for input. The little stock they (maybe) have available in Gen 2/Gen 3 Pro are at decent prices on the site.

[jon_slider]

@contactcr

@jon_slider

colormunki has full CRI data, including CRI R9 and R12, and is more accurate overall.

ArgyllPro app on Android

thanks for the details, an Android spectrometer for $258.

My wallet is safe, colormunki and ArgylII do not work on my Apple Computer, nor my iPhone

I really appreciate your data shared…

Im also really happy with my Opple, I would buy it again.
They are in stock on Aliex, recommended.

The Opple is suprisingly accurate for CCT, and CRI Ra. If I pick up a light and do not know what LED is in it, my Opple can help me figure out whether it is high cri or low cri, and whether it is 3000K or 4000K, etc…

I find the Opple Tint DUV data Very useful, especially for comparing lights to each other and sharing that info in a beam color photo.

An example of how the Opple can be used to help share tint information and answer questions such as:
Is a Dedomed 5700K 519a as “Pink” as sw45K?
Does the XP-L Hi 5000K have tint duv above or below the bbl, how does it compare in tint to sw45k and DD5700K?

,
(not my photo, not my opple, pic links to source)

[Unheard]

@Correllux

But……did notice this statement on their aliexpress listing. Seems they are considering a Gen 4 unit and are asking for input.

Thanks, done.