S14 Outdoor String Light Replacment Bulbs - 25 Pack Our S14 11 watt bulbs are for use with our heavy duty lights strings or any other medium base (E27) light socket. These bulbs are 130 volt and measure 3 1/2" tall and 1 3/4" wide. Our S14 commercial grade bulbs have a 6,000 hour bulb life provide long term illumination for indoor and outdoor use. 25 Pack S14 Outdoor String Light Replacement Bulbs Long life 6,000 hour Bulbs Nickel Coated E27 Medium Base 130 Volt 11 Watt For Indoor and Outdoor Use Perfect For Outdoor Patio and Restaurant Applications Your satisfaction is our #1 priority and if you have any issues at all please us and we would be more than happy to assist.