bright vs brightly

bright is an adjective but brightly is not an adjective.

Word	Noun	Adjective	Verb	Adverb
bright	No	Yes	No	Yes
brightly	No	No	No	Yes

As adverbs, bright and brightly are synonyms defined as:

Other synonyms of bright include brilliantly.

bright (adjective)	brightly (adjective)
emitting or reflecting light readily or in large amounts
not made dim or less bright
likely to turn out well in the future
having strong or striking color
splendid
characterized by happiness or gladness
characterized by quickness and ease in learning
having lots of light either natural or artificial
made smooth and bright by or as if by rubbing; reflecting a sheen or glow
clear and sharp and ringing

bright (adverb)	brightly (adverb)
with brightness	with brightness