|By law every vessel is required to show proper Navigation Lights from sunset to sunrise. They must be the proper color, intensity, location and visibility on your boat. Our LED and Bulb Navigation Lamps made by Hella Marine are available in 2NM or 3NM. These lights are used to prevent collisions at night or in times of reduced visibility. They allow you to see other vessels and for them to see you. Navigation Lights give information about the activity, size and direction of travel.