Lighting Facts rs | Brightness 310 lumen Estimated Yearly Energy Cost $0.41 Based on 3 hrs/day, 11¢kWh, Cost depends on rates and use. Life Based on 3 hrs/day 13.7 years Light Appearance Warm Cool be —— 2700K Energy Used 3.4 Watts ST1940/QPI92TCA {HARP Brightness 310 lumen Estimated Energy Cost $0.