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

[ChibiM]

@Oli

@djozz

People who are used to modd, and they know the influence of a AR-coated lens on the duv, so the results can be somewhat extrapolated to various situations.

Purple, green, blue? Which are going to raise or lower the duv? I’ll do some testing over the weekend.

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I tested a couple of mine, and the AR coated (purple) ones from Convoy influenced on average of about 0.0010 (I measured 0.0012)

Here's the data I have: https://budgetlightforum.com/t/-/69051/78

[Oli]

@ChibiM

I tested a couple of mine, and the AR coated (purple) ones from Convoy influenced on average of about 0.0010 (I measured 0.0012)

Here’s the data I have: Comparing 20 LEDs (with and without high CRI) in 14 Convoy s2+: final personal observations - #78 by ChibiM

Yikes I don’t know how I missed that thread because I intended to follow it. I’ll spend an hour reading your 24-hour test session results. Then I’ll spend at least 15 minutes seeing if I can duplicate a tiny fraction of your results.

[zuluwalker]

@djozz

I do like to include duv measurements with led tests because it provides relevant information for flashlight enthousiasts (I use a spectrometer), and because the duv is dependent on how you measure it (as Chibi mentions), I have standardised how I measure it: I place a small smooth reflector over the bare led and measure in the hotspot that the reflector produces, I usually provide duv results for a couple of different led currents. I chose this because that is how a led is often used by flashlight people, so it is a useful measurement. People who are used to modding flashlights with different leds will know that a TIR optic produces a hotspot that has a bit lower duv than a reflector, and they know the influence of a AR-coated lens on the duv, so the results can be somewhat extrapolated to various situations. How I do +not+ measure duv: *straight above the bare led. That part of the light cone of a led has the lowest duv, that is far from representative of the total light output of the led. You may only get close to this light in an aspheric build (that predominantly uses the light straight above the led). *in my integrated sphere, because that removes blue from the spectrum/lowers the CCT by at least 300K; if the sphere changes the spectrum I can not imagine that duv is not affected too. One exception: If you own an integrating sphere combined with a spectrometer, and the data is corrected for spectrum changes by the sphere, this wíll work fine for duv measurement of the total output, but by my knowledge maukka is the only flashlight hobbyist that owns such a setup.

I love getting schooled, I'm a better guy after it lol! Thanks man, I'm picking up some real good methodologies from this post.

[zuluwalker]

Some more tests of me shining a light at an Opple! The TIR on these lights really change the CCT of the emitters.

Astrolux MF01 mini 4000K Moon @ 1ft	Astrolux MF01 mini 6500K Moon @ 1ft
Astrolux MF01 mini 4000K Top of Ramp @ 3ft	Astrolux MF01 mini 6500K Top of Ramp @ 3ft
Astrolux MF01 mini 4000K Turbo @ 5ft	Astrolux MF01 mini 6500K Turbo @ 5ft

These new MF01 minis came with the brass insert, and are going to be used even with the green tint. Pretty good floody hotrods, hopefully I'll get enough experience to tackle a reflow on this with tint-mixed 519As.

Update: my Opple G3 won't hold a charge anymore. Good thing about it is that it works even if the battery's toast. Going to try sending it back for a replacement still.

[Stagg3r]

Anyone had any further contact or info on more Pro models that can be obtained in the US? A few months ago, somone got a May timeline out of them. I’ve been checking everywhere I can think to look and the best I can find are some Euro sellers that list the GIII avaliable and in stock (no gen 2 listed) and then have pics of the GIII and Pro. That doesn’t do much for my confidence so I’m hoping I’ll have a shot at an actual Pro model some day. Anyone hear any whispers?

[jon_slider]

@Stagg3r

I’m hoping I’ll have a shot at an actual Pro model some day.

I hope it happens for you…

fwiw, on page 1 of this thread it says:

“NOTE: The Opple Light Master PRO (which is the same as the III or G3) is the one you want”

here is a review that says the same… G3 = Pro:

Cheap device to measure color temperature of light / flashlights (Opple Light...

[Stagg3r]

I read that, and just about all of the following comments. It still seemed like some grey area exists. There are some simple graphic differences which may just be the regional branding difference. The one that I didn’t see any definitive conclusion on was the light vs dark/pro app. It was said that it was a regional release but it seemed to have a few more capabilities, if I understand. Always difficult when one is processing a long thread with information that changed or was updated over time. If the “GIII” can run the dark app that shows R values, sure that one is fine.

[jon_slider]

> If the “GIII” can run the dark app that shows R values, sure that one is fine.

yes, the Pro can show CRI Ra, only, no other R values.

> some Euro sellers that list the GIII avaliable and in stock

I hope it is actually in stock for you to buy, from a seller that will give you a refund if they ship you a G2 instead.

maybe ask for a photo of the actual item,
if it says Pro on the front, that is good.

Although, there are some that do not say Pro on front, and are still G3 and work with the Pro app to show CRI Ra (such as the one in the 1lumen review link I posted above.)

[Verodin]

Been eyeballing the pro and since it’s May now, but still out of stock, I asked them today…… August Opple offical store on AE.

[ChibiM]

If you're in Europe, you can still buy the III, although at a much higher price.

[jon_slider]

@ChibiM

If you’re in Europe, you can still buy the III, although at a much higher price.

link?

@Verodin

Been eyeballing the pro and since it’s May now, but still out of stock, I asked them today…… August :person_facepalming: Opple offical store on AE.

thanks for the update
some people use Light Spectrum Pro instead… I have not tried it

[Verodin]

@jon_slider

thanks for the update
some people use Light Spectrum Pro instead… I have not tried it

@ChibiM

If you’re in Europe, you can still buy the III, although at a much higher price.

link?

I just checked myself and still had the page open: Opple Light Master G3 Luxmeter ab € 34,27 (2024) | Preisvergleich Geizhals Deutschland

Higher price might be acceptable, but shipping (to Sweden) takes it over the top (17 - 20 EUR)

[ChibiM]

Here are 4

https://www.ledclusive.de/en/light-master-g3-748

https://www.klusspullen.nl/a/544951/opple-light-master-iii

https://www.elektrobode.nl/products/opple-light-master-iii-599000032700

https://www.techniekwebshop.nl/opple-lighting-light-master-g3-performer-light-master-iii-lux-meter-verkoop-per-1-x-1-stuk-599000032700-6941497719355-10368790-indicatie-aanduiding-digitaal-meetbereik-0-50000-lx-meetwaardegeheugen-ja-interface-ja.html

[Verodin]

Thanks for the NL links ChibiM.

Misschien bij m’n ouders laten afleveren, zij komen deze zomer toch mijn kant op (Dutch, sorry couldn’t resist)

[jon_slider]

@Verodin

Higher price might be acceptable, but shipping (to Sweden) takes it over the top (17 - 20 EUR)

You found it for 56 Euro delivered?

@ChibiM

Here are 4

thanks ;-), so people can buy Opple in Europe still, for about 50 Euro?..

I can understand being sorry to have missed the sale…, I paid 31 Euro for mine…

Its a great tool, I would consider putting 1 Euro per day in a piggy bank, for 4 weeks… That would “save” me an extra 28 Euros… before August

[Verodin]

@jon_slider

Its a great tool, I would consider putting 1 Euro per day in a piggy bank, for 4 weeks… That would “save” me the extra 28 Euros… before August

I’m not in a hurry, but was mentally counting on them being available this month. August feels so far away, although to be honest, during summer any light related stuff is low prio anyway. Barely any darkness to use flashlights. It’s more that flashlights have been piling up and I’d like to get some measurements that are more accurate than eyeballing light on a white wall. Either now or after summer would be ok.

[Verodin]

@jon_slider

@Verodin

Higher price might be acceptable, but shipping (to Sweden) takes it over the top (17 - 20 EUR)

You found it for 56 Euro delivered?

More or less, but very dubious store (bad reviews). 60 eur with better reviews. Most end up towards 70 eur delivered

Main problem is the EU. A few years ago they dictated that you’re no longer allowed to sell goods in an envelope. Must use package and that’s 15+ EUR. Since then small things are just not fun anymore. Just get it from China instead. Lower price and free shipping most of the time.

[ChibiM]

hahaha. graag gedaan.

I couldn't order it at AliExpress to send to the Netherlands, probably of certain business restrictions? So I wonder why they still send it to Sweden...

[Verodin]

Haven’t got a clue. I can press buy now for the series 2 and no problem at all. Never had any issues ordering from China (except Banggood that can’t send Lumintop products a few years ago). Flashlights, batteries (even a 40 Ah pack), metals (Indium), weird sensors and electronics and lots of other stuff. All comes through.

[ChibiM]

I can order from other stores, but not from Opple on Aliexpress.. I heard there were other people having the same problem.. maybe they were all Dutch :D