Led tube light energy rating a power 8 watt energy consumption 11 kwh1000h series osram substitube value socket g13 voltage 230 v light colour warm white light output 650 lumen colour temperature 3 000 k beam angle 160 lifespan 30 000 h variable intensity not dimmable mercury free colour rendering index ra 80 ra length 600 mm diameter 28 mm average annual electricity cost 01951 kwh 215 euros source average electricity cost based o