adjective emitting or reflecting light readily or in large amounts
Similaragleamaglowaglitterbeadybeamingblazingbright as a new pennybrilliantardentglimmeryglisteningiridescentluridnoctilucentsatinyself-luminousshimmerysilvertwinkling
Oppositesdull
adjective having lots of light either natural or artificial
Similarlight
adjective made smooth and bright by or as if by rubbing; reflecting a sheen or glow
Similarpolished
adjective splendid
Similarglorious
adjective not made dim or less bright
Synonymsundimmed
adjective characterized by happiness or gladness
Similarhappy
adverb with brightness
Source: WordNet 3.1, Princeton University
