Fluorescent light energy rating a power 58 watt energy consumption 58 kwh1000h series osram relax l socket g13 light colour warm white light output 5 200 lumen colour temperature 2 700 k lifespan 18 000 h bulb shape tube light diameter 26 mm average annual electricity cost 01951 kwh 1132 euros source average electricity cost based on figures from eurostat as of 2016