A firefly is considered luminous. Luminous means that the organism or object has the ability to produce its own light.
A luminous body 'glows' on it's own (a firefly) while an illuminated body is seen with light. (a flash light at night on a book).
Only if it is lit.
Is screen of television an luminous or illuminated
Luminous.
A flashlight is a luminous object.
The moon is illuminated by the sun. It is not luminous, since it emits no light of its own, only reflected light.
Firefly
One is luminous and the other is illuminated. If you know what these words mean, that should be enough.
It is a source of light, hence luminous.
Firefly
They glow in the dark because luminous things have a quality that makes them glow. For instance, a firefly is luminous.
An illuminated object reflects light that came from somewhere else. A luminous object emitts its own light.