brilliance

a light within the field of vision that is brighter than the brightness to which the eyes are adapted; "a glare of sunlight"

the quality of being magnificent or splendid or grand; "for magnificence and personal service there is the Queen's hotel"; "his `Hamlet' lacks the brilliance that one expects"; "it is the university that gives the scene its stately splendor"; "an imaginative mix of old-fashioned grandeur and colorful art"; "advertisers capitalize on the grandness and elegance it brings to their products"

unusual mental ability