The UV light on the A5U is to “charge” the GITD body. So, the body blocks almost all UV light, not being good for other purposes.
The UV light on the A8U is to illuminate through the body. So, the body doesn’t block the UV light, being it good for other purposes.
Despite this, this is what you get from the A8U (without GITD body) if compared to a light with Nichia UV + ZWB filter:
(Initially posted in my review thread: “REVIEW”: RovyVon Aurora A8 UV – 350 Lumens – Nichia 219C – Keychain Light - #24 by MascaratumB)
This said, what I want to stress is that these lights (RovyVon, Jetbeam, …) that use side leds, are probably not the best if you want to check some bank notes!
Even the RovyVon E200u, with 3 UV-A/C leds on the side, is not good for that purpose! You can check it here: