Lens becomes lightsucker with long exposures, hungrily inhaling all available light, draining dark. Time burnishes surfaces. Traffic smears into neon arteries. Buildings exhude a phosphoresence.
The older cameras had a part called the bellows, which neatly dovetails with the respiratory metaphor. Scene sucked in coats emulsion, ready for the chemical rinse, and the passing of light onto a different emulsion to leave a final trace.
Phosphorensic. Light fingerprinted.