There are a few threads about measuring CCT or CRI, where the Opple Light Master got mentioned.
But I love to just dedicate a thread to it, because it’s quite a nice measuring device for people on a budget, and it deserves it.
Ok, what does it do:
It measures Lux
It measures CCT (light color temperature)
It measures CRI
And it's about USD 50 / Euro 40
Edit: I know it’s probably nothing like a real spectrometer/spectrophotometer. But it might be enough for most people wanting to measure an approximate CCT and CRI.
NOTE: The Opple Light Master PRO (which is the same as the III or G3) is the one you want , and the Opple Light Master II (which has limited features, and not recommended by some).
Keep this in mind when ordering… You want to the 3rd gen, and not the 2nd gen.
FYI… April 2023: the new v4 is now available: Opple Light Master 4
For disccussion visit the new thread:
I'm using it mostly to determine CCT, and the extra ability to 'measure' CRI is really nice.
Just wondering what you need the DUV for? If it had all those abilitites, really cool, but that's probably only available in handheld devices of $500+?
Been eyeing a Gossen Spectromaster, but they are like 20 times this little device.
it tells me the tint of the LED (I dont mean the color temperature).
tint is a major deciding factor in my LED selection… I intentionally do not buy LEDs with DUV above the BBL
Im much less concerned about color temperature. I can pretty easily figure that out by shining a light on a wall that is illuminated by an incandescent bulb (3000k), or by one of my flashlights LEDs with a known LED color temperature such as 4000k.
It has become pretty easy for me to know when Im looking at a sample that is either cooler or warmer than one of my reference lights.
there are many LEDs that can claim High CRI, but they can have green tint.
there are also many LEDs that can claim High CRI, but they can have very low Red CRI R9
for me, the Red CRI R9 specification is a Major and usually overlooked criteria, that helps me decide which LEDs to buy.
so Im not tempted to buy an Opple, since it is not accurate for DUV, does not offer CRI R9, and I dont need a device just to determine color temperature… thats pretty easy for me.
I also dont like the Ali price being double what you guys pay in Europe.
I only played with it for less than 30 minutes, and here are some of my measurements against the Maukka calibration lights I have.
As far as I’m concerned, I’m pretty satisfied with this.
I pointed the light in my integrating spheres and measured these 2 lights I have from Maukka.
I didn’t point directly to the sensor.
For me, (for my reviews) the most important thing is to show in what CCT range a light is. Even if it’s off by 10+%, I’m okay with that. It’s more to show if it’s 6500-7000K or 5000-5500K.
I’m not 100% sure how accurate the CRI measurement is.
Here are some screen shots from the App
You wrote in another thread that Opple told you the Light Master Pro version (see https://ifworlddesignguide.com/entry/282367-lightmaster-pro) would be identical with the Light Master III. The picture in the ‘iF world design guide’ clearly shows R9, Rf, Rg values on the app screen. Is this just a different software version if the hardware is identical? Did Opple clarify this?
Hmm. I wonder if it’s just a different app? That AliExpress listing calls it the Light Meter Pro G3 and the product is labeled “pro” on the bottom. Perhaps it can measure R9 but the app just doesn’t have it displayed?