Fluorescent light energy rating b power 42 watt energy consumption 42 kwh1000h series osram dulux te constant osram dulux te in plus socket gx24q light colour neutral white light output 3 200 lumen colour temperature 4 000 k bulb shape compact fluorescent tube style bulb housing length 160 mm average annual electricity cost 01951 kwh 819 euros source average electricity cost based on figures from eurostat as of 2016