Marine navigation lights are coloured electric lights that indicate the size of the vessel and the direction in which it is travelling avoiding collisions at sea and facilitating the navigation. Federal and International regulations require boats to carry lights between sunset and sunrise as well as during conditions of restricted visibility i.e fog or heavy rain. Lalizas navigation lights are approved for power boats or sail boats up to 20m. A variety of different designs, sizes, and finishes are available, offering a multitude of installation options. Depending on the model, navigation lights can be mounted vertically or horizontally on a suitable surface of the boat and they are connected to the central and auxiliary circuit. Navigations lights should not be put under any kind of strain, and should be positioned in such a way to conform to all regulations.