SYLVANIA CFL T2 Twist Light Bulb, 60W Equivalent, Efficient 13W, 850 Lumens, Medium Base, 2700K, Soft White - 4 Pack SHIPS IN 1 BUSINESS DAY OR LESS ENERGY EFFICIENT - Save up to 78% compared to an incandescent bulb with similar lumen output.Cost savings: Take advantage of an estimated cost of only 1.57 per year!BEST IN CLASS - This 8-pack of daylight bulbs produces a brightness of 850 lumens and a soft white color temperature of 2700K.LONG LASTING - Designed with a lifespan of 10,000 hours.OUTDOOR RATED - Use only in enclosed fixtures to prevent exposure to weather.