Led bulb led spot reflector lamp energy rating a power 78 watt energy consumption 8 kwh1000h series osram superstar reflector equivalent to light bulb 50 w socket gu5 3 voltage 12 v light colour neutral white light output 621 lumen luminous intensity 1 430 cd colour temperature 4 000 k beam angle 36 lifespan 25 000 h bulb shape reflector variable intensity dimmable colour rendering index ra 80 ra average annual electricity cost 01951