Discharge lamp light colour replicates effect of daylight power 250 watt energy consumption 250 kwh1000h series osram powerstar hqi ts socket g24 light colour daylight white light output 20 000 lumen lifespan 12 000 h style glass bulb uv filter average annual electricity cost 01951 kwh 4878 euros source average electricity cost based on figures from eurostat as of 2016