LED Fold Down All Around Lights are approved for USCG 2NM (Colreg 2 mile). Note: All USCG approved navigation lights must be mounted properly to provide the correct visual alignment and allow unimpeded sight lines. Please refer to United States Coast Guard regulations for 1 NM and 2 NM navigation lights for more information. Injection molded nylon/aluminum. 12 Volts. Fastener #8 FH.