Refulgency -

The quality of sending out rays of light; brilliance, radiance, or effulgence.

It is used for objects that catch and reflect light intensely, such as crystal chandeliers , gilded walls , or a queen's crown . Related Terms refulgency

While "brightness" is a common synonym, refulgency suggests a more majestic or dazzling type of light. Common Applications The quality of sending out rays of light;