Maybe because other boats don't have bright lights that would reflect off
the your corner reflectors.

There is a good reason for not using bright lights on a boat, they ruin the
night vision of other boaters.

When entering an anchorage or coming into a dock at night, I have had
'wanna-be-helpful' boater or dock walkers shine a bright light directly at
me.. $@^&(^

Steve
s/v Good Intentions