Halogen light pin socket bulb power 20 watt energy consumption 20 kwh1000h series philips capsuleline socket g4 voltage 12 v light colour warm white light output 310 lumen colour temperature 3 000 k lifespan 4 000 h style glass bulb variable intensity dimmable diameter 9 mm average annual electricity cost 01951 kwh 39 euros source average electricity cost based on figures from eurostat as of 2016