The light show consists of two color organs, also known as light organs. The upper middle display is driven by a Pulsar Zero 3000 light 3 channel controller. The left and right displays are driven by a Pulsar Zero 4000 light 4 channel controller - both units manufactured in the early 1980's by Pulsar Light of Cambridge.
The 10 way chaser in the lower middle is a reproduction of a Lights Fantastic 10x1500 controller, manufactured in the late 1970's. The chaser runs four patterns: chase, zig zag, shimmy and scramble with reverse direction, auto reverse, adjustable pause and jump, and has an audio input. The design has been enhanced with the addition of a microcontoller that switches modes automatically at random.
In this sequence the chaser is in auto mode and audio trigger.