Night in the city is bright. Rarely do extremely long exposures come into play like they do in the country landscape.
The opportunity is to change the wild variety of ambient light into poetry. Halogen, tungsetn, florescent, these sources
are infinite in their variety as they combine and recombine with sunset, moonlight, stars, and sunrise.
The city is never still. It is constantly moving. Night photography of the city freezes these trails of motion.
I can track the jitters of San Francisco with time exposures that show the passage of light.