These C9 opaque red replacement bulbs create a lighting display reminiscent of your childhood holidays. The 130 volt bulbs burn cooler, use less energy, and last longer. UL listed for indoor and outdoor use, they will give you 3,000 hours of diffused, colored lighting. Double dipped to resist chipping, even in storage, these Christmas light bulbs are fade resistant. Make your holiday displays festive and inviting by decorating your home and tree with these beautiful opaque light bulbs.