Drone racing at night in the Formula FPV 2016 London event.
The flags and tunnels were lit up with leds and there were small leds underneath the cones that formed the track path.
Although you could see the bright flags fine with a regular camera you really needed a proper night camera to run the course, otherwise you didn't have any other way to orientate yourself or even see the floor.
Camera used was a Night Wolf from Foxeer.
Recorded at around 10PM