Glow, chase, wig-wag...

The brake lights chosen were Maxxima 4" round LEDs, each with 44 individual diodes.  The turn indicators were sequential blinkers made by Lightning LED.  Each turn signal has five v-shaped arrows that light sequentially indicating the direction of turn.  The lights are fairly standard items available through large truck parts channels.

The flasher device for the interior brake lights is actually an accessory developed for motorcycle use on bikes with multiple brake lights, typically built in to fiberglass luggage compartments.  The device is the BackOFF Wig Wag, from Signal Dynamics.  Details of the device and other BackOFF models can be seen on their website.