Led bulb energy rating a power 8 watt energy consumption 8 kwh1000h series osram led star classic a equivalent to light bulb 40 w socket e27 voltage 230 v light colour warm white light output 470 lumen colour temperature 3 000 k lifespan 15 000 h bulb shape reflector style glass bulb variable intensity not dimmable mercury free colour rendering index ra 80 ra length 114 mm diameter 55 mm average annual electricity cost 01951 kwh 1