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What is a Disco Ball?

Michael Pollick
Updated May 17, 2024
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A disco ball, also known as a ball mirror, is a large sphere covered with numerous glass mirror pieces or other reflective material. The entire disco ball is usually suspended above the heads of dancers in a club. Once a spotlight is focused on the rotating ball, random streaks of light are projected onto the walls, ceiling and floor. A variable speed motor controlled by the DJ or lighting technician can change the speed and direction of the disco ball as it spins.

The mirrored dance ball actually predates the 'disco ball' by several decades. An early version can be seen in the movie Casablanca, for instance. When discotheques experienced a revival in the 1970s, creative lighting once again became an important part of the overall ambience. The random flashes of light generated by a disco ball created a dynamic background for other effects such as strobes and helicopter lights. As the disco culture became part of mainstream society, the disco ball became shorthand for a glitzy, upbeat club atmosphere.

When the popularity of disco waned in the early 1980s, the disco ball went with it. Some ballrooms still maintained a very large mirror ball to indicate an open dance floor, but the frenetic pace of a disco ball became more of a relic of a bygone era. By the late 1990s, however, a new generation of 'house music' enthusiasts revived many of the lighting and sound effects of the dance clubs, including the disco ball.

Today, those interested in owning a disco ball can order one through specialty gift stores, internet catalogs and theatrical lighting outlets. Large professional units with thousands of real mirrors can still run into the hundreds or even thousands of dollars, but some novelty varieties cost only ten to twenty dollars. The important thing to remember when hanging a disco ball is to provide a focused form of lighting, such as a pinspot or even a flashlight. Colored lights will produce color reflections, which may be more visually appealing.

For the craftier disco enthusiast, a perfectly useful disco ball can be created with a collection of unwanted CDs and a large foam sphere. Plans for this type of project can be found online or in do-it-yourself craft books. Other homemade disco ball ideas can also be found online, using everyday components such as latex balloons and reflective tape.

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Michael Pollick
By Michael Pollick , Writer
As a frequent contributor to WiseGeek, Michael Pollick uses his passion for research and writing to cover a wide range of topics. His curiosity drives him to study subjects in-depth, resulting in informative and engaging articles. Prior to becoming a professional writer, Michael honed his skills as an English tutor, poet, voice-over artist, and DJ.

Discussion Comments

By pollick — On Jul 13, 2012

I have been in some clubs recently that still use disco balls as part of their dance floor lighting set-up. I'd have to say that the one thing they do well is create an atmosphere of excitement. The effect of the lights as they move across the walls and reflect off dancers is definitely dynamic.

When I had a chance to run a light board during karaoke shows, I found that people got more excited on the dance floor if the disco ball was moving to the beat of the music. If I slowed the speed of the ball down during slow songs, the pace of the dancers also slowed down.

The idea of a disco ball may sound cheesy these days, but it does serve a purpose whenever a DJ needs to inject energy into the occasion.

By anon277994 — On Jul 03, 2012

Well, I think that disco balls are not so important in our days. It's more those flashy disco lights which I think cause too many epilepsy problems anyway.

Michael Pollick

Michael Pollick


As a frequent contributor to WiseGeek, Michael Pollick uses his passion for research and writing to cover a wide range...
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