1 x UV3TZ-405-30 Bivar, UV LED, 405nm 40mW 30 °, 2-Pin Through Hole package
They have a water clear lens and emit a purple coloured light. TZ Series UV LEDs - UV3TZ. The UV3TZ family form part of the TZ series of UV LEDs. Ultraviolet (UV) LEDs, Bivar. Radiant Flux 40mW. Peak Wavelength 405nm.