Who serves as the direct second-in-command to the gaffer?

The best boy electric serves as the direct second-in-command to the gaffer, who is responsible for the lighting on set. The best boy electric supports the gaffer in various tasks, such as managing the electrical crew, overseeing lights and equipment, and ensuring that everything runs smoothly during the filming process. This role is essential for maintaining the workflow and organization of the lighting department, allowing the gaffer to focus on the creative aspects of lighting design.

In contrast, the other roles listed, such as the production manager, grip, and sound mixer, serve different functions. The production manager oversees the budget and logistical aspects of the production, the grip handles non-electrical equipment that supports lighting and camera setups, and the sound mixer manages audio quality and recording. Each of these positions is vital to a film's production, but they do not hold the direct subordinate role to the gaffer that the best boy electric does.