Lighting equipment for DJs, parties, clubs, and some types of musical performances typically centers around lighting effects that create constantly moving patterns of light. Effects lighting equipment includes lasers, strobe lights, moonflower lights, lights that create water or flame effects, and a variety of sound-activated lights that shoot multicolored beams across the room. Effects lighting for parties and clubs is often combined with other effects equipment, most commonly fog machines, and sometimes bubble or snow machines. Mirror balls (sometimes called disco balls), police beacons, and blacklights round out the category of effects lighting. Many pieces of lighting system equipment can be configured to pulse and move in time with music.
In contrast, lighting for stage and theatrical productions is typically designed to focus audience attention on particular aspects of the production, and is therefore built around equipment that directs light to a specific area. Follow spots, pars, ellipsoidals, fresnels, and wash lights are combined to illuminate specific areas of the stage. Dimmers and gels allow stage lighting technicians to control light intensity and color during a production.
Both DJ and stage lighting require additional equipment beyond the lights themselves, such as controllers, cables, bulbs, clamps, stands, and trusses. As the initial investment in lighting equipment can be considerable, DJs and others sometimes buy used lighting equipment to save money. Whether buying new or used, prospective buyers should expect to encounter the terms "DMX" and "Intelligent Lights." DMX stands for Digital Multiplex Signal; it allows the user to control Intelligent Lights without running a wire between a controller and each individual light fixture.