Choose between these Twinkle C9 Replacement Bulbs. They will create a shimmering glow in your holiday display this season. Perfect to use in outdoor trees, they can be mixed with static burning bulbs for a fun lighting effect. These 7 watt, 130 volt assorted bulbs will blink on and off for 3000 hours and have nickle-coated bases to prevent corrosion. Intermediate base (e17) 3″ tall and 1 1/4″ wide.