Here are the possible solutions for light topper clue
Answer
Clue
Relevancy
cosmo
Clue
Topper of "Topper"
halo
Clue
Christmas tree topper's topper
Light topper
Definition
to form a ring of light
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