Yes these candles bubble cheerfully on your tree concealed bulb glows in the base lighting up the bubbling column Can be used on Christmas trees mantles or out front in your bushes to show your holiday spirit. Features: Color: multi-color bulbs/green wire. Multi-color consists of red green and yellow. Liquid comes in 3 colors: red blue and orange. Number of bulbs on string: 7. Bubbler size: 4.5 in. H x 1.75 in. W. Spacing between each light: 12 in. Lighted string length: 6 ft. Total string length: 7 ft. Wire gauge: 20. Additional Product Features: If 1 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 listed for indoor/outdoor use. End-to-end connectors allow you to connect multiple sets together (not to exceed 210-Watt). 120-Volt 60 Hz 0.29 Amp 35-Watt. Material(s): plastic/glass/wire.