Discharge lamp power 250 watt energy consumption 250 kwh1000h series osram vialox socket e40 light colour warm white light output 31 100 lumen colour temperature 2 000 k lifespan 32 000 h bulb shape elliptical style glass bulb average annual electricity cost 01951 kwh 4878 euros source average electricity cost based on figures from eurostat as of 2016