Electrical data Nominal wattage. 18W Energy Efficiency Label (EEL) A+ Rated wattage 18W Lamp Current (EM) (Nom) 0.33A Voltage (Nom) 57V Life to 8% Failures (Nom) 6000H Life to 30% Failures (Nom) 8000H Life to 50% Failures (Nom) 12000H Light technical data Luminous flux 1800LM Luminance 10 cd/cm2 Luminous efficacy 100 lm/W Dimensions & weight Diameter 53.0 mm Length 216.00mm