Optolamp LED Navigation Lights. Auto on/off, very low power draw, masthead lights. We use one of these Optolamps ourselves on our own boat - and have done for the last 10-15000 NM. It is normally the brightest anchor light in the bay, or the brightest tricolor in the fleet. These are great units, and in our opinion, the best available bar none. Sealed unit with wire tails. 50,000 hrs MTBF.