Energy saving bulb energy rating a power 15 watt energy consumption 15 kwh1000h series osram duluxstar mini ball equivalent to light bulb 75 w socket e27 voltage 230 v light colour warm white light output 850 lumen colour temperature 2 500 k lifespan 6 000 h bulb shape standard style decopipe straight variable intensity not dimmable length 125 mm diameter 60 mm average annual electricity cost 01951 kwh 293 euros source average electr