The crossword solution for the term 'LIGHT BIT' is 'RAY'. The word 'RAY' can refer to a beam of light, which is fitting for the term 'LIGHT BIT'. It can also refer to a type of fish, or a type of RAY-like shape. In mathematics, it can refer to a line extending from a point. In physics, it can refer to a particle or wave. In astronomy, it can refer to a stream of particles or radiation emitted from a star.