In my post from Feb. 6, I noted that I had more believable interior light levels, but this resulted in the 16 ft. (4.9 m) diameter, brass clock over the concourse entrance to be poorly lit.
This is fairly prototypical because, as can be seen by the photo on the left, the only way the photographer could get any light within the arch was by seriously overexposing the skylight coming through the windows. As such, for rotoscoping purposes, I found the best photo of the clock was taken during demolition of the station, as seen at right.
Since I didn't want to lose this detail in the dark and this is a "Hollywood set" version of the station, I installed a pair of 1950's vintage theatrical spotlights on the nearby ledges. It may not be prototypical, but it is believable. Now I can do a crane down shot starting on a close-up of the clock with the light reflecting from the brass.