Brilliance (noun)

1. The quality of being very bright and shining.
2. The quality of being intellectually brilliant or very clever.

Origin:

From french brillant ("brilliant"), from old french brillant, from latin brilliantem, present participle of brillare ("to shine"), from proto-italic *bʰrillān- ("to shine") from proto-indo-european *bʰer- ("to shine").

Examples:

1. The brilliance of the diamond was breathtaking.
2. The brilliance of the sun was too much to look at.
3. He spoke with brilliance and clarity.
4. She had a brilliance in her eyes when she spoke of her passion.
5. The brilliance of the starry night was beautiful.