Discharge lamp power 150 watt energy consumption 150 kwh1000h series osram powerball hci ts socket rx7s light colour neutral white light output 14 400 lumen colour temperature 4 200 k lifespan 12 000 h bulb shape tubular style glass bulb colour rendering index ra 95 ra length 138 mm diameter 23 mm average annual electricity cost 01951 kwh 2927 euros source average electricity cost based on figures from eurostat as of 2016