LED lights use 90% less energy. These durable, non-glass bulbs are cool to the touch and are equipped with Lamp Lock feature which makes them replaceable, interchangeable and keeps them from falling out. If one bulb burns out, the rest will stay lit. Details:Pure white bulbsGreen wireNumber of bulbs on string: 20Bulb size: wide-angle bulbs, blue, snowflake shaped light coversSpacing between each bulb: 4”Lighted length 6.3 feetTotal length: 8.8 feet25.5" lead cord4.75" tail cordComes with replacement bulbs and spare fuseEnd-to-end connectors allow you to connect multiple sets together (not to exceed 210 watts)UL listed for indoor/outdoor useWire gauge: 22120 volts 60 hertz .025 amps 3 watts