50 Pack Of Clear Traditional C9 Transparent Christmas Lights Have A Bright And Vibrant Coloring That Will Provide Years Of Use For Your Christmas Light Display. These 7 Watt, 130 Volt Bulbs With Intermediate Base Will Shine For 3000 Hours And Have Nickle Coated Bases To Prevent Corrosion. These Clear C9 Replacement Lamps Can Be Used Inside Or Out To Decorate Rooflines, Patios, And Walkways. Intermediate Base (E17) 3 Inches Tall And 1 1/4 Inches Wide. Used With All Kinds Of C9 Stringers Which Comes With E17 Intermediate Base(Sold Separately)