Note: Night photographers use existing light, of course. Some add light to the scene with flashes, flashlights, and other light sources, during long exposures. This is called painting with light.
Kodak Technical Data: Pictures by Existing Light
Night Photography Blog Andy Frazer
Marianne Engel Flowers at night
Susanne Friedrich Uses a Holga camera
Michael Frye National parks and petroglyphs with artificial light at dusk
Night Vision: Photographs of William Gedney and Lynn Saville
Dan Heller:
Matthew Donovan Lennert See Night Work
William Lesch Pioneer
Tom Paiva Industrial sites
Matthew Pillsbury:
Thomas Pflaum English Industrial sites
Berthold Steinhilber See Lightwork
Links Many links
ueber-der-nacht.de Eavo Varioles and Jan Mensing