Giant Christmas Lights
On display annually (at least through 2012) not far from Radio City Music Hall in New York City are these huge Christmas tree lights. Even when it is totally dark out, lights (in general) are bright and do not require the settings you might expect to need at this time of the day.
Here, with a wide f/1.4 aperture, I was able to use ISO 100 and still have a 1/200 shutter speed.
On another note, pay attention to how the progressive background blur brings the viewer's eye to the foreground lights. Full frame DSLR cameras and wide aperture lenses are a great combination for creating this effect.
Camera and Lens Settings
35mm f/1.4 1/200s ISO 100 5472 x 3648px