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.
Little Cowboy
© Michelle Campbellshadow dancing
© Donna R. MoratelliCat on a Hot Wood Porch
© Patricia MarroquinSymphony in Stained Glass
© Patricia MarroquinCass & Mindy
© Michelle Campbellobstruction
© Donna R. Moratelli