These red and green, commercial grade lights have a crackled finish creating the look of mercury glass. Each light has a clip on their base so you can easily attach the lights to your tree or other desired surfaces. Details:Red & Green bulbs, 3” x 2”Green wireNumber of bulbs on string: 10Bulb size: E17 brass base - fits into a standard C9 light socketBulb shape: PS50 Spacing between each bulb: 12"Lighted length: 9 feetTotal length: 10 feet6" lead cord6" tail cordFully assembledBulbs easily screw in and outUL listed for indoor and outdoor useContains end-to-end connectors which allows you to connect multiple sets together (not to exceed 210 watts)Wire gauge: 20120 volts 60 hertz .55 amps 70 wattsMaterial(s): glass bulbs/wire/plastic