180 Degree LED Green Navigation Light (200-018G2) by Lopolight.2nm 1*180 Degree Green, vertical mount. The Lopolight products are unique based innovative use of LED's (Light Emitting Diodes) and very effective and sophisticated power electronics that delivers low power consumption and extremely long lifetime even in the harshest conditions. In addition all lights are completely sealed to allow submersion. Actually Lopolight has found their way onto several submarines - where the lights are found to work flawlessly after being tested to 350 meters depth.