Luminous refers to something that emits or reflects light, or is well-lit or illuminated. It can also describe something that is very beautiful or wise. Here are some key points about luminous:

• Luminous objects emit or reflect light, such as the sun, stars, or a light bulb.
• Luminous can also describe something that is well-lit or illuminated, such as a room or a ballroom.
• Luminous can be used to describe something that is very beautiful or wise.

Luminous flux is a measure of the perceived power of light.