reflected or diffused light from a concealed source
WordReference Random House Unabridged Dictionary of American English © 2025
in′direct light′ing,
- reflected or diffused light, used esp. in interiors to avoid glare or shadows.
- 1920–25
Collins Concise English Dictionary © HarperCollins Publishers::
'indirect lighting' also found in these entries (note: many are not synonyms or translations):