When it comes to describing a "source of light", there are several synonyms that can be used to add variation and depth to your writing. Some of these synonyms include "illumination", "radiance", "brightness", "glow", "luminosity", "shine", "brilliance", "radiant energy", "beam" and "glitter". Each of these words carry their own unique connotations and can be used to describe different types of sources of light, from the warm glow of a candle to the intense brightness of the sun. So next time you want to add a little extra flair to your writing, consider reaching for one of these synonyms to describe your source of light.