Here are the possible solutions for signalling light clue
Answer
Clue
Relevancy
beacon
Clue
Signalling light
Definition
to shine like a light on high
buzzer
Clue
Signalling device (for a wasp, perhaps)
Definition
an apparatus that makes a buzzing sound
tictac
Clue
Racecourse bookmakers' signalling system
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
