Novelty Lights blue C7 string light set with 25 bulbs is perfect for outdoor patios, decks, special event or Christmas lighting. Each set includes 25 long life C7 bulbs on a green wire stringer with 25 sockets that are spaced 12" apart. These durable vintage filament blue transparent C7 light strings have long lasting 3,000 hour bulbs and are on a 20 gauge SPT-1 green wire. All our C7 light strings use high quality materials that will stand up to all weathering. These C7 string light sets are great for putting on a roofline, decorating and indoor/outdoor tree, restaurant lighting, wedding events, and much more.