I live near Chicago, Illinois and I have been growing mostly Cattleyas in a sunroom for over three years. There cannot be many more places that have the short, dark winter days as here, but my orchids seem to do fine over the winter. I do not do anything special concerning lighting during the winter. But, since the sun is lower in the sky during this period, when it is bright outside the sunroom does get more light than during the summer, though the duration is a lot less than summer.
The biggest trick is keeping them dry during the winter and maintaining the humidity near 50%. I cut back a lot on watering, and only water when there is a bright sunny day so the plants will dry before nightfall.