Back Light separates subject from background, saints from sinners, and one pro from another. Angle: toward the lens from above and behind the subject, or above, behind, and slightly to the side of it, high enough to cut lens Flare. It is especially helpful for video images that may suffer loss-of-edge contrast. Sins: confusing this source withBackg [..]

 A light source positioned behind the subject, often obscuring and creating a sense of menace.

In receivers, a display may be lit from the rear to create better visibility under a wide range of ambient light conditions.

A box like display consisting of an advertiser's message printed on a translucent material which is then internally illuminated.