What may a power driven vessel of less than 12 meters in length show instead of the masthead light and sternlight?

A power-driven vessel of less than 12 meters in length may show an all-round white light in lieu of the masthead light and sternlight. This all-round white light must be visible from all directions and is typically mounted at a height that ensures visibility. Additionally, the vessel may also display sidelights if it is engaged in activities requiring them.