In addition to an all-round white light, what light(s) must power-driven vessels less than 65.6 feet (20 meters) long exhibit when underway between sunset and sunrise?

The vessel must also have red and green side lights.

The red light is placed on the port (left) side of the boat while the green light is placed on the starboard (right) side of the vehicle. The white lights are on both the masthead (front) and stern (rear) of the boat, unless the vessel is less than 39.4 feet, in which case the front and rear white light may be combined as only one white light.