This G40 light set has gold mercury glass style light covers. Inside of the G40 light covers are clear incandescent mini lights that give a soft， warm glow. This unique set comes with a UL certification for indoor and outdoor use making them ideal for decorating along gutters， roofline or outdoor holiday trees. Features:Color: clear bulbs / white wire Gold mercury glass style light coversNumber of bulbs on string: 10 Bulb size: G40Bulb type: incandescentSpacing between each bulb: 7 Approx. lighted length: 5.25 Approx. total length: 7 13 lead cord 9 tail cord Additional Product Features: If one bulb burns out， the rest will stay lit Contains end-to-end connectors that allow you to connect multiple sets together (not to exceed 210 watts)UL certified and approved for indoor/outdoor use Comes with replacement bulbs and spare fusesWire gauge: 22 120 volts， 60 hertz， .08 amps， 9.6 watts