Aleph 19 UV Head Kit consists of a Aleph 19 head + bezel ring, sapphire window + o-ring and a 19 mm reflector. Now comes with McR19XR reflector.
Specially engraved UV warning symbol on A19 head for UV LE
The 19 mm reflector was designed to be in focus with the Nichia jupiter and Cree 7090 LED's but that it also provides a reasonable flood beam with Luxeon LED's.
The 19 mm reflector was designed for Cree 7090 LED, specifically the UV. The reflector is of a very short focal length and relatively very deep. The intent is for a concentrated spill or flood portion of the beam coupled with a divergent reflected beam. The overall beam is relatively bright without a large and overwhelming spot beam.
Easy to identify UV light without having to turn light on.