Fluorescent light energy rating b power 13 watt energy consumption 13 kwh1000h series osram dulux te plus socket gx24q light colour warm white light output 900 lumen colour temperature 2 700 k lifespan 15 000 h bulb shape compact fluorescent tube style bulb housing average annual electricity cost 01951 kwh 254 euros source average electricity cost based on figures from eurostat as of 2016