Amount of Light That Makes a Photo Light or Dark
This page is the CodyCross answer for the clue below from Tracking Time, Group 1053, Puzzle 5 (Horologium).
Question is: Amount of Light That Makes a Photo Light or Dark
and the answer is: EXPOSURE
Word Meaning:
EXPOSURE — (uncountable) The condition of being exposed, uncovered, or unprotected.
Definitions from Wiktionary.