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

[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.

[jon_slider]

The Opple is a really useful meter. They are still in stock. If anyone is interested in learning more about the Tint and Color of their LEDs… I highly recommend picking one up. It is plenty accurate enough for comparing lights to each other.

a consistent technique, produces consistent results:

Convoy S21D w/ legendary Nichia 219b - Review & comparison w/ Nichia 519a, E21a & other lights with Nichia LEDs incl. Emisar D4V2, Convoy S21F. (Summary & measurements on P. 1)

The tested lenses are larger so what I did was taking off the S21D’s OEM lens, then placed the tested lens by holding it, recorded the number, then put back OEM, recorded another number. I did about 4-5 runs or so for each lens, sometimes more. The flashlight was set at 35% brightness and let sit for 15 minutes or so before measuring. I decided to use the middle-of-the-road 30° bead TIR optic this time. With flashlight mounted on tripod (hence no shaking), I’ve found the Opple Lightmaster Pro (…

@cannga

With flashlight mounted on tripod (hence no shaking), I’ve found the Opple Lightmaster Pro to be incredibly consistent in its reading of Duv (and brightness & Ra etc.). It reads the same x,y coordinates down to the fourth significant figure between different runs. As such it is a great meter to do comparison work; just remarkable considering how cheap it is. I recommend it extremely highly for anyone into LED collecting.

[Bob_McBob]

@jon_slider

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

ArgyllCMS and ColorCalculator both work fine in MacOS :money_mouth_face:

[ChibiM]

Oh, an Opple LIght Master 4.. that's exciting.

But funny at the same time, because how is it possible to not be able to produce Light Master 3/PRO, but okay for the 4... strange.

Anyway..

Some tips:

1. Make an export feature with ALL measurement at once :D .. now we have to swipe to see different parts. (and would be nice to include flicker as well)
2. Include DUV (so we dont'have to calculate it ourselves)
3. Include R9?
4. USB-C port please
5. Make an accessory holder to put the Light Master in different angles without doing this manually
6. Just wishful thinking: logging feature please

But for the most part, the USB-C would be the easiest, together with the DUV numbers... for the rest, I think that's just wishful thinking. And making the device more expensive.

It's quite incredible value for the money at this point.. so I just hope it stays affordable so many people can enjoy it.

[thefreeman]

@ChibiM

Oh, an Opple LIght Master 4… that’s exciting.

But funny at the same time, because how is it possible to not be able to produce Light Master 3/PRO, but okay for the 4… strange.&nbsp

The 3 uses the AS7262 which is ”Not Recommended for New Designs” and there is a more recent chip with more color channels (AS7341) so it makes sense to make a new version.

[Unheard]

A gen 4 LM could be launched next year according to an answer I got from Opple.

[SemiNormal]

@ChibiM

Oh, an Opple LIght Master 4.. that's exciting.

But funny at the same time, because how is it possible to not be able to produce Light Master 3/PRO, but okay for the 4... strange.

Anyway..

Some tips:

1. Make an export feature with ALL measurement at once :D .. now we have to swipe to see different parts. (and would be nice to include flicker as well)
2. Include DUV (so we dont'have to calculate it ourselves)
3. Include R9?
4. USB-C port please
5. Make an accessory holder to put the Light Master in different angles without doing this manually
6. Just wishful thinking: logging feature please

But for the most part, the USB-C would be the easiest, together with the DUV numbers... for the rest, I think that's just wishful thinking. And making the device more expensive.

It's quite incredible value for the money at this point.. so I just hope it stays affordable so many people can enjoy it.

The DUV could be added now to the Gen3/Pro since it would just require updating the app.

[cannga]

@ChibiM

Include R9?

USB-C port please

Agreed.
Most important: R9. Not that I am really, really interested in this number (I got the value from Simon/Hank and reviews here anyway), more that I am annoyed that Opple owners can’t get it while others can lol .
Bonus and mandatory for this day and age: USB-C.

And thanks for starting this thread :+1: . I’ve had so much fun and learned a lot about flashlight behavior since I got the Opple Pro/3.

[Unheard]

Nice thing is one of the sensors in this chip matches the R9 wavelength. Not sure how helpful that is though. I guess the absolute sensor output must be related to less sharply measured values.

[id30209]

R9

USB-C

Duv calculator

[cannga]

Send them in email if you are interested (R9 and USB-C for me):

From Aliexpress https://www.aliexpress.com/item/3256803116495145.html?spm=a2g0o.productlist.0.0.6fff305bDOkxpG&algo_pvid=19d82623-e95c-4c06-8838-48d65043a32b&algo_exp_id=19d82623-e95c-4c06-8838-48d65043a32b-0&pdp_ext_f={"sku_id"%3A"12000025283672457"}&pdp_npi=2%40dis!USD!29.46!14.73!!!!!%40210318be16611154920004707e57ac!12000025283672457!sea&curPageLogUid=oQi8ZMizogEW

If you have some advice, or request about 4th generation, please send Email to us.
Thank you for your supports of Light Master.

Email Address: opplelightmaster@outlook.com

[jon_slider]

@cannga

R9… I am annoyed that Opple owners can’t get it while others can lol

dont feel bad for $40

People pay at least 4x the price of the Opple, to get a used Colormunki Spectrometer, that they can plug into their Android phone running a $99 app.

The small all in one handheld spectrometers start at about $800 and go up from there, kind of like Hankos and Cool Fall lights…

How badly do you want R9 data? :money_mouth_face: