Here are the possible solutions for it might set off a light clue
Answer
Clue
Relevancy
sensor
Clue
It might set off a light
vivalasvegas
Clue
Elvis standard that begins "Bright light city gonna set my soul / Gonna set my soul on fire"
alarm
Clue
It may be set or set off
Definition
to strike with fear
twi
Clue
What might start off light?
heist
Clue
It might set off alarms
Definition
to steal, rob
glorybeam
Clue
"The light" of "I saw the light!"?
laser
Clue
Light in a light show
Light-show light
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
