“REVIEW”: RovyVon Aurora A8 UV – 350 Lumens – Nichia 219C – Keychain Light

Thanks for checking the UV for me!

What is the mAh of the battery?

Maybe the housing blocks UV and it ends up as very cool blue?…

No problem mate :wink:

In the OP, under general specifications :wink:

Battery: 130mAh Li-polymer – 4.2V

Hum, it is not blue, it is like purple. But I’m not sure if it is due to the host. The other UV light I showed, when used without the UV filter produces a different type of “light” but we can still check those marks un currency. The UV filter only “filters” the more visible light.
So I believe it has to do with the type of emitter used and not the host itself ! Can it be :question:

If you take your Tool with ZWB2 filter and turn it on at Aurora - does the side white LED start to shine? If it does - the host passes the UV light which excites the phosphor. If it doesn’t - the host blocks UV.

You could also try to take ZWB2 filter and put in front of Aurora’s UV emitter and see how does it work…

I tried that in a photo from the OP! I guess this is what you mean, right? The Tool AA was shining above the A8U and this was the result!

Hum, I did it but it didn’t change much! I put the filter in front if the A8m but there was no change in the way I was seeing the marks in the 5€ bill! It never appeared as the Tool AA, the marks were never “revealed” with the A8 :weary:

I forgot about the OP pic. :slight_smile:
Yeah, seems like the body is not the culprit. It surely absorbs some of the light and reemits it but seems that some gets transmitted.
I don’t know about banknotes….

When I look at this:

I see that it shows some marks but very poorly. So maybe the issue is that it generates a lot of visible light (luminous body doesn’t help) relatively to amount of UV?
Then ZWB2 should help….but it didn’t…I don’t know.

Yup, there are only 2 or 3 small marks that could be seen, but nothing like the the other UV led form the Tool AA!
This A8 doesn’t have the luminous body, that one is the A5 :wink: So that part of glowing doesn’t interfere with that! The body is transparent, but even with the UV filter it doesn’t get different if front of it! Later today I will try to show it on a picture!
I guess it has to do with the UV LED used :zipper_mouth_face:

When I look at the picture when you light it up with UV - it seems to be glowing blue. Not much and surely not nearly as much as A5 - but seems to be glowing.

Maybe EU banknotes only reacts to 365nm and the A8 uses a 405nm ?

Hum, I guess that the blue is somehow a reflex of the UV in the polycarbonate fiber, but it surely doesn’t glow :wink:
Actually, recently I added a stripe of GITD tape to locate in darkness, as it doesn’t absorb any light, at least not to the point of glowing.

According to specs it uses a 365nm LED! But…it’s the specs. I have another UV light (SK68 clone) that uses a 395 nm LED and emits a more purple light. The one from the Aurora A8 seems closer to that and not from the Nichia UV :zipper_mouth_face:

Just got mine, with blue/red/amber. Seeing the results of the UV version, I’m glad I passed on that. The A8 is little smaller than I was imagining. In the past, what I’d sometimes do is take some stiff paper or cardboard and cut out shapes to then assemble and get a feel for the sizing. I didn’t do that here. I’m amazed at how small it actually is. A good thing, though!

I like this whole concept of a translucent polycarbonate shell. It’s “skeleton” like without showing off too much. And then one polished side for the emitters to shine through. I’m curious to see how well it holds up over time when coming into contact with blunt metal objects.

The UI takes a little getting used to, but easy to adopt. As opposed to having a lockout with various challenges, I find the RovyVon approach of a double-click for ON to be quite workable. I do not mind long-press for off. It’s pretty brief. PLUS… if the light is on for more than 180 seconds, a single press will turn it off. A secondary safeguard in the rare case of accidental activation.

Just one oddity… upon close examination, I found something curious. At first I thought it was a small shaving of polycarbonite caught inside the plastic, but it was stuck to the inside of the polished surface.

I dropped the A8 on a hard wooden floor, and the particle disappeared. It must have been some random particle that lodged itself in just the right spot for me to notice it. It’s gone out of view now. Even still, it’s so small and doesn’t really obstruct the emitters, so if it comes back I probably won’t even notice it.

Phosphor is primarily excited by blue light.

We use 172nm UV to excite phosphors in our excimer lamps, but longer UV wavelengths will love also excite phosphors.

Yeah, most phosphors are tuned for blue but UV excites them as well. An as that Tool had LZWB2 filter - it was mostly UV coming out.

If I understand your methodology correctly you are suggesting using the zwb2 filter to filter out everything BUT UV and still see if it excites the phosphor? Because the phosphor is also excited (primarily blue) by UV you need to cut everything that is not.

Yes.

BTW, here’s transmission curve for polycarbonate:

According to it - PC doesn’t realy pass UV.

Here’s ZWB2:

Together there should be only small transmission around 400 nm. Is that enough to exite the phosphor? Maybe… or maybe the body is not PC or is some different type of PC?

Mine arrived today :slight_smile:

Here it is next to some AAA flashlights (top to bottom: Astrolux A01, Thrunite Ti3 (my EDC), Aurora A8, Sofirn C01, Manker E02). Diameter is same as Thrunite and Sofirn.

I like the UI (1 click for tactical, 2 cicks for moonlight then cycle L-M-H, 3 clicks for UV side light then cycle red-red flash-UV, 4 clicks for white/reading sidelight).

I got the Aurora because I wanted to try the white sidelight, as something I use on a desk without a diffuser.

Eheh, glad you like it :wink: It is a sweet little light :wink: How do you like the side (white) light ?! I’m carrying both the A5 and A8, love them :smiley: