Re: Boating at night to watch fireworks
Never use headlights or worse, flood lights, while operating at night, unless you are totally alone way up in the swamp looking for logs and such.
Never shine a light at another boat above the waterline.
Learn where your unlit channel markers are, and hit them briefly with a flashlight or spot.
Have your sounding device handy.
In very dark situations, cover your dashboard lights. Kill all interior lights. Dim your radio and GPS.
As for anchoring to watch the fireworks--I did that last year in the bay--and I suggest doing a little more than the single white "anchor" light--they were impossible to spot. Without shining anything at others, I think you should have something more to illuminate the boat. One bulb on a 32' cruiser does nothing, but a light against the hull or top structure would be perfect.
And be sure NOT to leave your running (bow) lights on while anchored. Few boaters around here know that.