Keychain remote and switch that can easily be wired to turn on your sailboat's spreader or other deck lights as you approach your boat, or turn them off after you leave.
Tips on operating at night, with a discussion of the importance of not spoiling your (and nearby boaters') night vision
LED lights clip onto the bill of your cap for hands-free use.
Performs triple duty as an emergency personal strobe, a three-level flashlight, and a set of navigationlights for a small boat.
The most detailed review and test of single- and multi-LED flashlights around, particularly as they might be used in an emergency. Info from 2001, so some may be out of date.