Tenebrism

"Active from 1595 – 1610, Caravaggio was a major transitional figure in art moving from exaggerated Mannerism to a highly naturalistic style, illuminated with powerful light and shadow.  This dramatic use of light to intensify an image, also known as tenebrism, clearly influenced Spanish artists of the era."

http://daydreamtourist.com/2013/12/02/spanish-baroque/