Next time you break an oar in the dark or run out of gas and are hanging to a bouy or better yet drifting with the tide and wind for off shore islands or even better hanging to the upturned dink in 7 degree water just be thankful you didn't get suckered for the revenue grab.
I live aboard , but have to go to work at 5 am so I use a suction cup mounted light on a 20 litre bucket at the bow of my inflatable . Also a stern light on a pole . That way I can be seen in the dark while motoring to the boat ramp , should have saved my money and got a bag of rocks to throw at the fishos leaving the ramp at that time , they are to busy playing with chart plotters and fishing gear or cups of coffee to actually look where they are going . At least I can count on one or two days of the week to have an exciting start .
I have had both the Aqua Signal series 23 navigation lights for my dinghy since 2011 (white and bi-color).
I kept them aboard the boat on a dry shelf with the batteries removed when not in use. I found the all-around white light most useful as a flashlight on occasion (probably got 2 hours use) and probably used the bi-color light twice for less than 15 minutes TOTAL. At the end of last season (5 years) the white light was getting dim, and the bicolor light didn't work at all, so I replaced the 4 AA batteries the other day. No change in operation...
Flashlights that don't work, and empty staplers, are two of my pet peeves, so I investigated. If possible, I had hope that I could repair. If not, well they weren't working anyway...
I traced the problem down to the switch, which is mounted in the rubber encased body of the light. I had to tear the light apart, but here is what I discovered; it seems that the lights are water resistant, not waterproof. Any moisture that can get into the body of the light will eventually make its way to the switch, and corrode the contacts of the switch. There is a small hollow rivet which provides a path for the moisture to get here, and it will eventually corrode the contacts. I believe that they have a 2 star rating at Jamestown Distributors.
If any of you depend on these lights, I suggest that you inject Boeshield into the rivet hole under the switch at least annually.
In the meantime, I have two LED lights, and two lenses, one clear, and the other bicolored that are of no use to me.