Fluorescent light energy rating b power 10 watt energy consumption 10 kwh1000h series osram dulux de socket g24q light colour warm white light output 1 380 lumen colour temperature 3 000 k lifespan 15 000 h bulb shape compact fluorescent tube style bulb housing average annual electricity cost 01951 kwh 195 euros source average electricity cost based on figures from eurostat as of 2016