Here's a short two-minute night racing video from the recent IRRA rules four-hour enduro race held at my home track. We ran the last hour of the race with the raceway lights and windows totally blacked out. There were a few lights left on for the first minute of the first nighttime heat to allow the racers to charge up the light kit capacitors but after that it was lights out for the next 59 minutes of the race. Everyone thought it was really cool and a great time was had by all. Surprisedly the lap times were only a tenth or two slower than the daylight times.
Video courtesy of Ralph Josey.