HELLA 959900001 '9900 Series' NaviLED PRO Multivolt 9-33V DC 2 NM LED Port Light with Colored Outer Lens and Black Shroud 2 NM NaviLED PRO Port Side-Mount Navigation Lamp - Black Pro Series with High-Impact housing Grilamid lens Minimum visible distance is 2 nautical miles LED technology means ultra low current draw and no bulbs means no maintenance for an ultra long service life Multivolt 9-33 Volts DC technology is spike protected to +500 Volts DC and reverse polarity protected to -500 Volts DC Sealed light unit clips into mounting shroud for an ultra secure attachment Pre-wired with 2.5 meter of twin core marine cables