The Osculati bicolour navigation light has a mirror polished stainless steel case and is suitable for vessels under 20 metres in length using either 12 or 24 volt electrical systems. This nav light utilises LED technology to produce a 225° arc of bright LED light, which is more energy efficient and has a longer life than standard bulbs. For a spare 12V LED bulb please use part numbers 731728 (red) and 731729 (green).