The illumination of a photographic subject from the rear, causing edges to glow while other areas remain in shadow.(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "backlighting" in a sentence
"Fluorescent and LED backlighting is also available."
"It's viciously bright if you ask it to be, and the backlighting is a very assuring white as opposed to a tinted red, orange, pink or blue hue on some other phones we've used."
"The screen resolution is 1366 by 768 with LED backlighting, which is a step up from many netbooks this size."