The led they say they are using I tested a while ago, LG 365nm UV led tested (LEUVA33W70RL00, from Simon), it has a large die and LG 365nm leds seem to be tougher than Nichia or Seoul Viosys leds. They emit a substantial amount of visible light but that is what the ZWB2 filter is for. It can indeed work at 1750mA if on a DTP board and mounted well. Btw, you can buy it (same light same led without silly inscription) at Simon’s own Convoy site for less than half that price, 15.65€ 26% OFF|Grijs Convoy S2 Uv 365nm Zaklamp, 7135*5 Single Mode, Zwb2 Filter Geïnstalleerd, uva 18650 Ultraviolet Zaklamp, Fakkel|Zaklampen| - AliExpress