Sidelights are red (port) and green (starboard) and shine from dead ahead to 112.5° aft on either side.
Stern lights are white and shine aft and 67.5° forward on each side. (Thus, the sidelights and stern light create a full circle of light.)
All-round lights are white and shine through 360°.
Masthead lights are white and shine from 112.5° on the port side through dead ahead to 112.5° on the starboard side. They must be above the sidelights.