The viewing angle produced (the full angle measured at the half peak luminous intensity value) will vary depending on the chip size, colour and position of the LED used. LEDiL REGINA Series LED Reflectors. The REGINA LED reflector, from LEDil, is designed for use with single LED light sources from several manufacturers including: Cree XP-E and XP-G, Nichia NCSxx19A and NVSxx19A, Osram OS Oslon SSL 150 and Oslon SSL 80, Philips Lumileds LUXEON Rebel and LUXEON Rebel ES and Seoul Semiconductors Z5. Reflector diameter: 19mm Reflector material: metallised polycarbonate