Halogen light pin socket bulb reflector lamp power 50 watt energy consumption 50 kwh1000h series philips twistline alu socket gu10 voltage 230 v light colour warm white light output 330 lumen luminous intensity 600 cd colour temperature 2 800 k beam angle 40 lifespan 2 000 h bulb shape reflector variable intensity dimmable uv filter colour rendering index ra 100 ra length 51 mm diameter 50 mm average annual electricity cost 01951 kwh