This Energy-Efficient Soft White Bulb Has The Same Look, Feel And Nearly The Same Brightness As Traditional Incandescents. 43-Watt Bulb Uses 28 Percent Less Energy Than Regular Incandescents, Helping You Save Money On Energy Costs. 120-Volt Bulb Is Perfect For Use In Common Household Fixtures Like Table Lamps, Floor Lamps, Enclosed Ceiling Fixtures And Bare Lamp Sockets. Bulbs Feature A Medium Screw Base And Are Designed To Last 1,000 Hours Using 620 Lumens. Floodlights Have Been Rated At 2,700 Kelvin And Offer A Cri Of 100..