25 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" tall and 1 1/4" wide. Use with our Green or White wire 25" or 100" C9 stringers (sold separately). Also, works great with our C9 1,000" commercial bulk reels (sold separately).