Assuming that you mean light in the visible spectrum, it would mean that the thing is giving of radiation that is in the visible light spectrum
When something gives out light, it is called luminescence. This could be from artificial sources like light bulbs or natural sources like the sun or fire.
The word for something that gives out light without heat is "luminescent." The process is called luminescence, and the light produced is often referred to as "cold light."
A black hole
I think you are looking for the word Luminescent, as in the lightbulb was luminescent Lumin - meaning light escent - meaning giving or displaying Luminescent - something that gives out light
it means to glow or to shine or to have light
luminous
The word you are looking for is "luminary".
A person - usually well-known - who inspires or influences others; a person who is famous or important; a celebrity. I can also mean something that gives light; a celestial body such as the sun or moon.
The sun is a natural source of light that provides warmth and illumination to Earth.
To illuminate is to shed light on something. It can mean to actually light something up or to make something brighter. It is also used to mean to make something understandable as in to shed light on a subject or a puzzle, making a problem more clearly understandable or visible.
ANSWER:Luminous could also mean 'full of light or illuminated'. For example: luminous hands of a clock. Here, luminous denotes shiny or that give light. In the example: luminous room; luminous indicates well-lighted. Something that is clear or easy to understand is also termed luminous. Fro example: luminous prose or luminous theory. Luminous could also mean inspiring, intelligent, or enlightened.
Oxy = Acid, Gono = Something that gives-produces something.