AFAIK, all current Prime models use the same optics. Just open the bezel and take a look inside, it’s very easy to open. If it’s too hard to open, you can make your own wrench from an M12 Hex bolt.
Check your Prime Pro C2 special modes (4x clicks) if it still has the voltage reading then it’s the older Prime with good TIR optic. Older Prime optic creates very clean and well defined hotspot, while Yajiamei is tighter and has good transition from hot spot to spill.
How to check:
4 fast clicks to enter special modes. Hold and release to select: strobe - fast beacon - and voltage reading like this: (long) Blink………(fast) blink blink blink blink.
The last four fast blinks will follow your battery voltage, four blinks for fully charged, three blinks 75, two blinks 50, and one short blink 25% to near depletion.
OK, want to see something even more ridiculous? I replaced the optic with a dimpled Yajiamei (45 degree I think) which is installed without glass. The output is now 967 lumens from 635 lumens with the stock optic. It handles heat so much better the runtime is shortened by over 5 minutes because the driver can maintain higher output in addition to the improved optical efficiency. This light is in a different class with a simple drop-in mod.
I’m using ceilingbounce calibrated with lights of known outputs. It’s not that accurate, but the difference between optics is readily apparent, and the numbers should be approximately correct. You can even see the better thermal management in the driver behaviour.
I bought a bunch of Prime A1 Pro and A2 Pro. I wonder if the Yajiamei optics fit in those. I searched and found a bunch of them but don’t know which ones fit? Does the dimensions (e.g. 20mm) refer to the outer diameter of the ring?
Correct, the plain tight TIR produces the most OTF lumens 30ish% in my case.
With Prime max angle for max OTF output is < 20°
With Wizard ax angle for max output is < 60°
The reason is the unusually deep recession in Prime’s lens. It’s not too severe in Wizard because the bezel isn’t as tall as Prime and it’s countersunk.
I use 5° because it’s my sidekick for occasional medium thrower, 90% of the time I use my Tiara Pro for hiking/EDC.
That really depends on what city we are talking about. In my city, this most probably is the brightest. But in Texas it would be just another ordinary LED flashlight. Especially if you live next to Texas_Ace and DBCustom.