Musical acts can always do better if they have some sort of gimmick. The band Future Dancing is using a nostalgic-looking light organ as theirs. There is an Instructable on the neat light organ showing off the organ’s 12 bulbs that correspond to 12 notes in the octave (minus the octave note). The lights are positioned where the pipes on a pipe organ would be and the bulbs light up whenever a key is pressed on the MIDI keyboard. Also, the sustain pedal is recognized and can hold the light accordingly.
Other than a midi controller, a computer is also needed to send the data to the bulbs. Check it out in the video below.