Gu5 3 mr16 halogen low voltage reflector alu 20w36the aluminium coated reflector without a cover disc reduces the heat load in the lamp by approximately 60 compared to aluminium coated reflectors with a cover disk and approximately 80 compared to cold light reflectors with a cover disc the dimmable bulb with uv reduced glass in accordance with iec 60432 offers neutrally coloured light throughout the entire lifespanwithout protective glasslifespan 3 000 hoursray angle 36 degrees