Everything that reflects light has brightness. Something doesn't need to emit its own light to have brightness. However, if it emits light of its own, it will u

Everything that reflects light has brightness. Something doesn't need to emit its own light to have brightness. However, if it emits light of its own, it will usually appear brighter. [1] http://en.wikipedia.org/wiki/Brightness http://en.wikipedia.org/wiki/Brightness