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Parabolic Reflector Bulbs (PAR)

Bulbs used to control the level of light more precisely. They provide about four times the light of General Service (A) bulbs and are used in recessed and track lighting. Weatherproof casings make them suitable for outdoor spot and flood lighting fixtures.

PAR Lamps

Parabolic Aluminized Reflector Lamp. Constructed of hard glass with a separate back reflector and front legs that are fused together. PAR lamps may be line or low voltage and can be used unprotected outdoors.

Pendant Lights

Pendants can provide both general and task lighting. With shades or globes to avoid glare, they can be suspended from the ceiling over dinette table, kitchen counters or work areas. When used over end or night tables they free up space normally occupied by table lamps. The addition of a dimmer control allows you to alter the intensity of the light to suit your mood or time of day.

Pendant Mounted

Pendant mount on a chain, stem, cable or wire, and hand down into space. The word also refers to a style of hanging fixture with a single, central luminous element (like a cone, globe or dish), distinguished from a chandelier, which typically has several arms or luminous elements.

Photocell

Light-sensitive device used to operate fixtures according to available daylight. They are used in solar lighting and to turn outdoor or security lights on and off at dusk and dawn.

Pilot Light (LED or Lamp)

A "Pilot Light" indicates the on/off state of the circuit controlled by the switch. Some Energy codes require the occupant to be able to see the on/off state of the lighting circuit even when the switch is not located in the area where the lights are. A Pilot Light on a wall switch meets this requirement.

On the other hand a Locator light on a wall switch helps the occupant find the switch in the dark.

Pinhole

Recessed downlight that includes a faceplate with a small aperture used for inconspicuous accent lights.

Plenum

The space between the ceiling and the floor or roof above.

Power Feed

The connection point that brings electricity to track and other lighting systems. Power feed may be at the end, floating or at a wiring intersection.

Prism

Refractor of transparent glass or plastic, with three or more straight sides. Light entering one side of the prism bends and exits the other side.

Protocol Implementation Conformance Statement - PICS

A written document, created by the manufacturer of a device, which identifies the particular options specified by BACnet that are implemented in the device.

Pull-Down Fixture

Recessed downlight with a retractable lamp-holder/housing (usually a round-back cylinder) that pulls down from the ceiling at angles up to 90 degrees from vertical.

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