PAR 56

Overview

PAR 56 refers to a standardized size of so-called PAR lamps (Parabolic Aluminized Reflector). It is a sealed-beam lamp where the light source, parabolic reflector, and diffusion glass are fused into a single sealed unit. The number in the name indicates the diameter in eighths of an inch: 56/8 inches = 7 inches, approximately 178 mm. PAR 56 thus falls between the smaller PAR 46 and the larger PAR 64 lamps, which dominate theater and concerts.

The lamp is inserted into a spotlight housing, the so-called PAR can. The reflector and optics are in the lamp itself; the can serves as a holder, stray light shield, and support for accessories. The beam of light is characteristically oval; by rotating the lamp in the can, the longitudinal axis of the oval can be aligned.

Technical Data

• Diameter: approx. 178 mm (7 inches)
• Typical Wattages: 200 W, 300 W, and 500 W (depending on manufacturer and voltage)
• Base: usually GX16d, also available with screw bases
• Voltage Variants: available in 30 V, 120 V, and 240 V, among others
• Construction: Sealed-beam lamp with integrated parabolic reflector

The diffusion glass front determines the light distribution. Common beam characteristics are:

Use on Set

PAR 56 cans are compact, robust, and comparatively inexpensive spotlights for medium distances. In film and TV lighting, they are used for accent and effect lighting, for illuminating backgrounds, and as part of light arrays. Compared to the larger PAR 64, they are lighter and more space-saving but deliver less luminous flux.

The beam width is not adjusted via the fixture but by selecting the appropriate lamp (NSP/MFL/WFL). As with all PAR lamps with halogen/incandescent technology, the color temperature is warm (tungsten range); for defined colors or color temperature correction, filter foils are used in the gel frame holder in front of the can. Today, classic PAR 56 incandescent lamps are often replaced by LED retrofit lamps or LED PAR cans in the same form factor.