The term 'not as bright' can be described by the crossword solutions FADED (5 letters), DIMMER (6 letters), duller (6 letters), denser (6 letters), paler (5 letters), dumber (6 letters), slower (6 letters), and GLOOMIER (8 letters). FADED implies a lack of vibrancy or color, while DIMMER and duller suggest a lack of brightness or clarity. Denser implies a lack of space or airiness, while paler implies a lack of intensity or saturation. Dumber implies a lack of intelligence or understanding, while slower implies a lack of speed or agility. Finally, GLOOMIER implies a lack of cheerfulness or optimism.