FYI alot of people don't realize the requirements for nav lights when they install head lights, most head lights on duck boats, (close proximity of the running lights) washout the character of the port and starboard lights making you liable in the event of a collision or at a minimum possibly a citation for using them in the navigable waters. I recommend extending your existing Red/Green higher above the headlights to minimize this.
I personally didn't use my head lights much this year, instead I bought a rechargable spot light 2 million candle and used it when i needed it, You can see alot farther and more. Cheaper (got mine for $16) .
Vessels are required to show the proper navigation lights from sunset to sunrise in all weather conditions, good and bad. During these times, no other lights that could be mistaken for lights specified in the Rules of the Road can be displayed, nor any lights that impair the visibility or distinctive character of navigation lights, or interfere with the keeping of a proper lookout. The Rules also state that navigation lights must be shown in conditions of reduced visibility, and may be shown at other times considered necessary.
"Kill counts are for snipers, fighter pilots and Novice duck hunters."