Color: Blue bulbs / white wire. The number of bulbs on string: 70. Bulb size: M5 (mini bulb). Commercial-grade lights. Energy star lights. Select lights randomly twinkle to create a shimmering effect. LED lights use 90% less energy. If one bulb burns out the rest will stay lit. Durable non-glass bulbs. Non-replaceable bulbs feature single-mold construction. Unlike most lights, this type of construction prevents moisture from seeping in and causing corrosion. Water and weather-resistant. Cool to the touch. UL is listed for indoor or outdoor use. Contains end-to-end connectors which allow you to connect multiple sets together (not to exceed 210 watts). Wire gauge: 22. 60 hertz 0.08 amps.