Brian Whatcott wrote in message . ..

Still looking over your query one more time: you say the cloudiness
appears when under cover too? Maybe you're downwind from some
pollution source?

Interesting thought. FWIW:

- Maine is famous for acid rain (though it doesn't cloud/oxidize my
other plastic lights); ozone is also generally higher here than most
places (much of it naturally-produced by conifers);

- occurs equally on both the sun-exposed side & the total shade side
(during long haulout), so doesn't appear to be UV-related;

- occurs at the same rate when afloat;

- all portlights are below & surrounded by typically-oxidized/chalked
older white gelcoat (pigment dust *bonding* somehow to the lights? A
SWAG).

It's a rather minor issue but one I thought might or might not be
pertinent to those here who exhaustively evaluate various materials.