Discharge lamp power 70 watt energy consumption 70 kwh1000h series osram powerball hci ts socket rx7s light colour neutral white light output 6 500 lumen colour temperature 4 200 k lifespan 12 000 h bulb shape tubular style glass bulb colour rendering index ra 95 ra length 120 mm diameter 20 mm average annual electricity cost 01951 kwh 1366 euros source average electricity cost based on figures from eurostat as of 2016