Lighting has many properties where variation gives visual choices. Moving Lights are at the top of the list in this ability. Each unit has different options that you have to look at carefully. These choices can involve fixture focus location, speed, color, shape, sharpness, gobo, strobe and more. This is an area where watching product videos is incredibly important. Sometimes moving lights are stylistically used to have individual "specials" in many locations and sometimes they are used to visually dance. While an initial investment the payoff goes on and on. Categorized below a spot fixture has the added ability to project gobos and have a defined beam, while the wash fixtures are generally for a soft edge color. A scanner is a non moving fixture with a moving mirror. - Louie Lumen