Yes, I know all that stuff about light or lack of it, have had ducks and hens for 20 years, but it never affected my previous ducks - they went off lay for a month at the end of September, then came back on lay end October, right through to February,went off lay for a month then back on again till September again - regular as clockwork regardless of light or weather. This lot haven't laid eggs for 3 months!
My next door neighbour is pretty miffed at not getting his regular supply of free range duck eggs
and if they don't get a shift on they'll be on a few Christmas dinner tables !