Halogen light golf ball bulb energy rating d power 28 watt energy consumption 28 kwh1000h series philips ecoclassic30 p45 equivalent to light bulb 35 w socket e14 voltage 230 v light colour warm white light output 346 lumen colour temperature 2 800 k lifespan 2 000 h bulb shape golf ball style glass bulb variable intensity dimmable colour rendering index ra 100 ra length 80 mm diameter 45 mm average annual electricity cost 01951 kwh