The Gaffer is the Chief Lighting Technician. He designs and executes the lighting plan. His head assistant is called the Best Boy. The ELT are responsible for getting power to the set. The Gaffer knows what needs to be done, and where the lights should be placed. The Grip does the actual work and places the lights. Then, there is the Grip Department. The Key Grip works with the DP to have the correct lighting. The Key Grip is in charge of the physical camera movement as well. Then, the Key Grip has an assistant, called the Best Boy Grip. And the Grips are the ones that work with non-electrical components of light and camera setups, such as tripods or cranes. There is also the dolly grip. They push and pull the dolly during filming.