Natural Illumination, Not During Night-Time
This page is the CodyCross answer for the clue below from Airport, Group 454, Puzzle 5 (Plane Spotting).
Question is: Natural Illumination, Not During Night-Time
and the answer is: DAYLIGHT
Word Meaning:
DAYLIGHT — The natural light that is ambient in daytime, being mostly sunlight (both direct and indirect, on either sunny days or cloudy days).
Definitions from Wiktionary.