The term 'light element' can be broken down into two crossword solutions: NEON (4 letters) and BEAM (4 letters). NEON is a chemical element with the symbol Ne and atomic number 10. It is a noble gas that is found in trace amounts in the atmosphere and is used in lighting and advertising signs. BEAM is a type of light that is emitted from a source, such as a flashlight or a lamp. It is usually focused and directed in a particular direction.