Led tube light energy rating a power 9 watt energy consumption 9 kwh1000h series osram ledinestra equivalent to light bulb 38 w socket s14d voltage 230 v light colour warm white light output 450 lumen colour temperature 2 700 k lifespan 20 000 h bulb shape tube light variable intensity dimmable mercury free colour rendering index ra 80 ra length 500 mm diameter 29 mm average annual electricity cost 01951 kwh 176 euros source aver