Hi Oded! I designed a UV version of the Lumen a couple of years ago. It uses four smaller LEDs in parallel. It was designed for this LED but there are a lot in this form factor:
Below are the design files in Eagle (original and UV version) and you could replace the LED PCB on a Lumen quite easily. The important thing to remember is that the Lumen is a constant current driver set to run up to 2 amps. The LEDs have to be able to handle 2 amps total or they could burn out. You could adjust the firmware to reduce current or send a limited signal range.