light-sensitive

From light (noun) +‎ sensitive.

light-sensitive (comparative more light-sensitive, superlative most light-sensitive)

1. Affected by, or sensitive to light.
   • 1963 August, “The semi-automatic Tees Yard of the North Eastern Region”, in Modern Railways, page 124:

     All lights are automatically extinguished at daylight by light-sensitive relay.

2. (photography) Of a substance or surface, changing chemically or physically when exposed to light.
3. (biology) Of a cell, tissue or organ, able to detect the presence (or intensity) of light.