"Best boy" is a term used in the film industry to describe the chief assistant who works closely with the gaffer or lighting technician. This term can be substituted with other synonyms such as first assistant, top hand, key grip, or lead grip. The role of the best boy is to assist in the setting up of lighting equipment, maintain the equipment during the shoot, and ensure that all safety procedures are observed. They are vital members of the lighting team and play an important role in the smooth running of film productions. While the term "best boy" may seem like an unusual title, the various synonyms help to highlight the importance and relevance of the role.