A Parabolic Aluminized Reflector light, or PAR light, is a type of light commonly used in motion picture production when a substantial amount of light is required for a scene. They are nearly identical in principle to the old style sealed-beam automobile headlight or, when used in grid patterns, to stadium lighting. They are frequently used in patterns of multiple lights such as 3 by 3 (known as a "nine light") when large areas are to be lighted.