Here are the possible solutions for periods of light clue
Answer
Clue
Relevancy
eon
Clue
Periods upon periods
Definition
a long period of time, also AEON
days
Clue
Periods of light
Definition
DAY, the time between sunrise and sunset
daytimes
Clue
Periods of light
Definition
DAYTIME, the time during which it is day
glorybeam
Clue
"The light" of "I saw the light!"?
laser
Clue
Light in a light show
Light-show light
Light show light
Light in a light show, perhaps
Definition
a source of high-intensity optical, infrared, or ultraviolet radiation produced as a result of stimulated emission maintained within a solid, liquid, or gaseous medium
