Image Analysis:  Identifying 7 distinct qualities of light - specular, diffused, direction, exposure, key, color, and ratio.
nCharacteristics of Light
nIdentify the quality of the source light -
nDirection - degrees camera left, right or center of key light (ex.: 90 deg. Camera L)
nSource as specular - hard shadow edge transfer (pinpoint source)
nSource as diffused - soft edge transfer (broad source)
nIdentify these additional qualities . . .
nExposure Value - Normal, Over, or Under
nBrightness Key - High key (all white or pastels), Low key (all dark tones) and Normal Key (everything else)
nColor Response - Neutral, Warm, Cool (the color of the source - see specular)
nLighting Ratios - 1:1, 1:2, 1:4, 1:8 and 1:8+  (difference between shadow values and highlight values)