Fluorescent light energy rating b power 42 watt energy consumption 42 kwh1000h series osram dulux te plus socket gx24q light colour neutral white light output 600 lumen colour temperature 4 000 k lifespan 15 000 h bulb shape compact fluorescent tube average annual electricity cost 01951 kwh 819 euros source average electricity cost based on figures from eurostat as of 2016