Yes these "candles" bubble cheerfully on your tree. Bulb glows in the base lighting up the bubbling column!! Can be used on your Christmas tree or outside in your bushes. Features: Color: clear bulb / green wire Number of bulbs on string: 7 Bubbler size: 4.5" high x 1.75" diameter Spacing between each light: 12" Lighted string length: 6'' Total string length: 7'' Wire gauge: 20 Additional Product Features: If one bulb goes out the rest will stay lit Each light has a clip on their base so you can easily attach the lights to your tree or other desired surfaces Minor assembly required UL certified and approved for indoor or outdoor use End-to-end connectors allow you to connect multiple sets together (not to exceed 210 watts) 120 volts 60 hertz .29 amps 35 watts Material(s): plastic/glass/wire