We don’t normally see the stained glass window lit up at night from inside the house. I kind of like it! The outside holiday lights are blue and white, so they were perfect for backlighting the window.
The pattern is from a set discovered by amateur mathematician Marjorie Rice while she was researching irregular polygons which would tile a plane. I thought this one was particularly nice and have used it for a series of stained glass projects.More on Marjorie Rice here: https://sites.google.com/site/intriguingtessellations/