Just fooling around…
I shot a handful of frames, and chose this one because of the halo around the blue light, which was purely coincidental. All of the out-of-focus orbs are reflections of the tree in the nearby window, in case it wasn’t clear – the crossbar is the decorative frame between the double layer of glass. Thus the stacked orbs, except for those that fall right on the crossbar, which is between the glass panes and preventing a second reflection from the back glass. But whatever, I just liked it.