I’m sorry to disappoint you, but that’s no 219C.
Soooo what is it ?
NICHIA NVSW219C-R9050 LED according to user manual :question:
Most probably 219B-V1 R9050, not sure about the tint, if it’s quite warm, it’s probably sw40.
In fact, there’s no need to be disappointed, the 219B-V1 is great and offers much better CRI than 219C at this point. Most people overlook it and think it’s 219B, but 219B-V1 is more efficient than 219B and has even better CRI than 219A.
If it was a 219C you’d see some black parts on it. Also there is no R9050 variant of the 219C at this point.
Again, if you were after highest CRI Nichia, you got the right one. But I’m really starting to have problems taking Manker for serious.
So the NICHIA NVSW219C-R9050 LED and 90CRI statements in user manual/manufacturer website is wrong?
90CRI is true. 219C is definitely not true.
If I’m correct on the tint being around 4000K than the LED would be:
NVSL219B-V1 R9050 sw40
Thanks. Next time I contact manufacturer I’ll ask about this matter and share their reply. 
no problem. Again, if you want really high CRI, than this LED is one of the best choices. The 219C?, not really.
Look for the little black triangle in one of the four corners of the LED — that identifies it as the “b” emitter
You can see that in the pictures from Manker, and look it up various places that show images:
219a (four sides and one corner marked), 219b (one corner marked): Any new developments in High CRI ?
and 219c (no corners marked).
Nobody knows what they’re selling.
Great review.
Is this the exact same light as the Astrolux A01 (Nichia 219B), just with different lettering?
It’s no 219B and no 219A, it’s the 219B-V1.
Look at this thread, comment #174, #178, #179, ( #182 ), #204, and the actual proof was #205, where the image is gone. But it showed a 100% proof. I wonder why it’s gone now…
It seems to me a nicer shape and finish than most AAA size lights. It might even be second to the SS-5039 (which has little else in its favor).
The 219C does not necessarily give it lower output than it would have with an XP-G. Unlike a regulating driver, a boost driver will put out more charge at the lower voltage. It is even more efficient with a smaller difference between the input and output voltages and will put out more energy with the Nichia’s lower forward voltage. The fact that the measured efficiency is low is probably due to a less expensive driver or stray losses.
A third generation Osram Oslon Square might have done even better. 3rd generation Oslon Square, a 5000K 70CRI led tested Its forward voltage at low current is even better than that of the Nichia.
This review says the Manker has an AR lens. I don’t see that in my Astrolux.
The Astrolux (orange) I got a few days ago does seem to have an AR coating on t he lens.
Nothing special, just a thin film of something slightly colored, not like what you’d expect on a camera lens or binoculars, but it’s not plain glass
Moonlight mode mafia strikes again!!!
Very good job UPz, thank you very much.
The UPz for the efficiency estimates 
+1
Yes, I agree. With such small battery capacity, this is a very helpful chart.
what’s the difference between this and the A01?
I just presumed that Manker changed the name from A01 (astrolux) to E01 to call it their own.