Moon

the moon in her complement

The moon in heraldry is blazoned in various manners: When at the full, she is said to be in her complement or in plenitude or plentitude; when her horns point towards the chief, she is a crescent; when pointed to the sinister, decrescent; and when to the dexter, increscent or increment. When  in eclipse she is in detriment.

Moon illuminated, that is, with rays around the face.
Both increscent and decrescent may be encountered illuminated.