Halogen light energy rating c power 18 watt energy consumption 18 kwh1000h series philips ecoclassic t25l socket e14 voltage 230 v light colour warm white luminous intensity 204 cd colour temperature 2 800 k lifespan 2 000 h bulb shape bulb style glass bulb variable intensity dimmable length 86 mm diameter 25 mm average annual electricity cost 01951 kwh 351 euros source average electricity cost based on figures from eurostat as of 2016