Light (both natural and otherwise) is an essential tool in photography - here's a gallery dedicated to light use in photos, including low-light photography, black and white available light photos, night and morning photos.
Mountain Storm
© Kerry Dragermorning thaw
© Donna R. MoratelliDoe In The Woods
© Michelle CampbellRing Me Up
© Patricia MarroquinMetropolitan SLC, UT
© Trae C. Patton