Lucubration :: Lucubration (n.) The act of lucubrating, or studying by candlelight; nocturnal study; meditation..
Lucubration :: Lucubration (n.) That which is composed by night; that which is produced by meditation in retirement; hence (loosely) any literary composition.
Lucubrator :: Lucubrator (n.) One who studies by night; also, one who produces lucubrations..
Lucubratory :: Lucubratory (a.) Composed by candlelight, or by night; of or pertaining to night studies; laborious or painstaking..
Lucule :: Lucule (n.) A spot or fleck on the sun brighter than the surrounding surface.