Here are the possible solutions for sources of light or heat clue
Answer
Clue
Relevancy
lamps
Clue
Sources of light or heat
Definition
LAMP, to supply with a light
radiants
Clue
Sources of heat or light
Definition
RADIANT, a straight line from a point about which it is conceived to revolve
lasers
Clue
Light sources in a light show
Definition
LASER, 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
boilers
Clue
Heat sources
Definition
BOILER, a vessel for boiling
chilies
Clue
"Green" heat sources
Definition
CHILI, (Nahuatl) the (dried) red pod of a Capsicum pepper used in sauces, relishes, etc., also CHILE, CHILLI
