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.
church full of a wedding!
© Sandra J.Kisses
© Michelle CampbellGazing Into Her Eyes
© Michelle CampbellSpin,Spinning,Spun
© Lyndel ReeseLight & Shadow
© Kerry DragerMusical Harmony
© Heather K. McFarland