Natural seasonal laying is spring through early to late fall. Depends on the bird. Muscovy's that I have had typically go a little later in fall than my turkeys and geese. But they will stop laying a lot of the time around end of October or beginning of November I think. But with artificial lighting they will lay mostly all year long. But, like others have said, they will burn out sooner. But, if you want duck eggs all year, all this means is more meat and replacing your stock sooner than if you let them keep their natural cycle. 3 year old hen with artificial light will likely need to be replaced with a younger one the following year. totally your own personal preference. I have a very large family and eat a lot of eggs so my entire coop is set at 17 hours of artificial light a day all year long. And I get a lot of eggs. For instance I replace my Japanese quail every year. But for 1 year each hen lays an egg a day. I get 26 to 30 eggs a day everyday from them. I have 30 hens. But again, totally personal preference. And what you wanna do with YOUR birds. And most likely yours will probably start early next spring. Whether they are 8 weeks old or 3 weeks old. Only reliable way, in my own experience, to get a hen to start laying mid winter, (if that's when they hit sexual maturity) is with artificial lighting. So. Yep!!
