Here’s what I’ve learned as a permittee in
IATSE 709.
Both Grips and Electrics work together to create the look that the Director of Photography is trying to achieve.
The
Gaffer (Key LX) is comparable to
Lighting Designer as s(he) chooses
fixture types, placements, levels,
etc. But I’ve also worked with DOP’s who give specific direction to the design.
Electrics are also responsible for getting
power to other departments, and their trucks, trailers, carts,
etc.
Grips contribute to the design by adding flags,
gel, bounces,
etc that help shape the light. The Key
Grip decides which flags,
etc to use and where to place them. Grips (especially rigging grips) also
build infrastructure to support fixtures and other equipment, Such as camera dollies, jobs, lifts,
etc. Grips also provide other departments with sand bags, apple boxes, pads for levelling lighting stands.
Essentially, when it comes to lighting a shot, electrics take care of the fixtures themselves (hang/stands, focus,
gel) and getting
power to them. Grips take care of equipment which is not connected to the fixtures, but still affects the light (flags,
gel/filters not attached to fixtures, bounces,
etc.)
Of course there are always exceptions.
Best Boy (
grip or LX) is second in command of a department and mostly manages the crew and handles paperwork. S(he) will also act as
Gaffer/Key
Grip in the absence of the regular one.