light-sensitive

from WordNet (r) 3.0 (2006)

light-sensitive
    adj 1: sensitive to visible light; "photographic film is light-
           sensitive" [syn: {light-sensitive}, {photosensitive}]

from The Collaborative International Dictionary of English v.0.48

light-sensitive \light-sensitive\ adj.
   1. Affected by light; as, the light-sensitive pigments in the
      retina.

   Syn: photosensitive.
        [WordNet 1.5]

   2. Hence: (Chem.) Decomposing under the influence of light;
      unstable when exposed to light; -- of chemical compounds.
      [PJC] lightship