The first tube contains 32 leds, individually controllable. Here are some experiments to see what types of visual feelings are possible. This version wasn't portable, and the circuit was running off a breadboard. The next page shows some gnarly attempts at fitting all the electronics into the ends of the tube...

First trial tube - various illumination settings

First trial tube - various illumination settings

First trial tube - various illumination settings

First trial tube - various illumination settings

First trial tube - various illumination settings

First trial tube - various illumination settings

First trial tube - various illumination settings

First trial tube - various illumination settings

First trial tube - various illumination settings

First trial tube - various illumination settings