Fluorescent light energy rating b power 10 watt energy consumption 10 kwh1000h series sylvania lynx d socket g24d light colour warm white light output 600 lumen colour temperature 2 700 k lifespan 10 000 h bulb shape compact fluorescent tube length 115 mm average annual electricity cost 01951 kwh 195 euros source average electricity cost based on figures from eurostat as of 2016