Led bulb energy rating a power 11 watt energy consumption 11 kwh1000h series osram led superstar classic a advanced equivalent to light bulb 75 w socket e27 voltage 230 v light colour warm white light output 1 055 lumen colour temperature 2 700 k lifespan 20 000 h bulb shape standard variable intensity dimmable mercury free colour rendering index ra 80 ra length 110 mm diameter 60 mm average annual electricity cost 01951 kwh 215 eur