Nasa Marine Supernova LED Anchor Light

A range of long life LED navigation lights that meet COLREG rule 22 for vessels up to 12.5 metres in length.
They use high efficiency LED's ensuring long life and low power consumption. A tough polycarbonate shell protects the unit for the elements while a Gore-Tex membrane vent ensures equalization of pressure on the seals. 

• Supply voltage: 10 to 20 volts for full brightness
• Supply current ~ 200mA at 12 volts Typically 90 percent less than equivalent incandescent lamp
  
• Night time visibility ~ 2 nautical miles minimum 25 degrees above and below the centerline
  
• Waterproofness ~ IP65 Water jets and IP67 Submersion
  
• Dimensions ~ 91mm Diameter x 113mm Height including mount
  
• Configuration: 360 degrees Supplied with universal mounting bracket.