This holiday season the well-dressed house is wearing blue opaque Christmas string lights. The opaque color hides the incandescent filament while creating a soft traditional glow. The fade resistant bulbs are spaced 12 inches apart on 25 feet of green wire, making them ideal to decorate fences and rooflines. UL listed for both indoor and outdoor use, 3 sets can safely be connected end-to-end. Make your holiday displays warm and inviting with this colorful opaque string light.