Discharge lamp power 50 watt energy consumption 50 kwh1000h series osram vialox socket e27 voltage 230 v light colour warm white light output 3 500 lumen colour temperature 2 000 k lifespan 16 000 h bulb shape elliptical style glass bulb length 156 mm diameter 71 mm average annual electricity cost 01951 kwh 976 euros source average electricity cost based on figures from eurostat as of 2016