The C7 opaque blue Christmas lights are what the well-dressed house is wearing this holiday season. The opaque color hides the incandescent filament while creating a soft, cozy glow. The fade resistant bulbs are spaced 12 inches apart on 25 feet of green wire. UL listed for indoor/outdoor use, this light string has a lead and tail length of 6 inches each. Three sets can be safely connected with the male to female connections. This holiday season make your house glow with blue opaque lighting.