Running lights (theater)

Running lights, also known as chase lights, are a sequence of lights that illuminate in a repeating pattern, creating the illusion of movement. In theatrical lighting, running lights are frequently employed to simulate motion, direction, or energy on stage. They are typically controlled by a lighting console or a dedicated chase controller, allowing for adjustments to the speed, direction, and intensity of the sequence.

The effect is achieved by individually addressing a series of lighting instruments, such as PAR cans, LEDs, or strip lights, and turning them on and off in a pre-programmed order. The sequence can be simple, like a straight line of lights turning on and off sequentially, or more complex, involving multiple channels and overlapping patterns.

Running lights can be used for a variety of dramatic purposes. They might represent the movement of a vehicle, the flow of electricity, or the passage of time. They can also be used purely for visual effect, adding dynamic energy to a scene. The color, intensity, and speed of the running lights can be adjusted to create a wide range of moods and atmospheres. Their usage can vary from subtle background effects to prominent, attention-grabbing elements in a performance.