Hi Ken,
Most plants grown in nurseries for indoor use are grown under shade so they don't fall apart as soon as they are moved indoors. Shade grown Lyratas have larger, darker green leaves and they do hold up quite well if located immediately in front of a north window, IF the window is large enough and completely uncovered during the daylight hours. Of course, they will do even better if they get several hours of direct sunlight, but not everyone has that option.
In my business, I have learned how to care for plants in less than ideal conditions. Many of them fare much better than one would expect from reading the standard literature.
