Crestron Lighting Design Guía de instalación descargar pdf (Pagina 77)

230 V Lighting Design Guide

Doc. 4859C | crestron.com

NADIR: A reference direction directly below a luminaire, or straight down (0 degree angle).

NPF (NORMAL POWER FACTOR): A ballast/lamp combination in which no components (e.g., capacitors) have been

added to correct the power factor, making it normal (essentially low, typically 0.5 or 50%).

OCCUPANCY SENSOR: Control device that turns lights off after the space becomes unoccupied. May be ultrasonic,

infrared, or other type.

OPTICS: A term referring to the components of a light ﬁxture (such as reﬂectors, refractors, lenses, or louvers) or to

the light emitting or light-controlling performance of a ﬁxture.

PAR LAMP: A parabolic aluminized reﬂector (PAR) lamp. An incandescent, metal halide, or compact ﬂuorescent

lamp used to redirect light from the source using a parabolic reﬂector. Lamps are available with ﬂood or spot

distributions.

PAR 36: A PAR lamp that is 36 1/8 inch in diameter with a parabolic shaped reﬂector (See PAR LAMP).

PARABOLIC LUMINAIRE: A popular type of ﬂuorescent ﬁxture that has a louver composed of aluminum bafﬂes

curved in a parabolic shape. The resultant light distribution produced by this shape provides reduced glare, better

light control, and is considered to have greater aesthetic appeal.

PARACUBE: A metallic coated plastic louver made up of small squares. Often used to replace the lens in an installed

troffer to enhance its appearance. The paracube is visually comfortable, but the luminaire efﬁciency is lowered.

PARABOLIC LUMINAIRE: A popular type of ﬂuorescent ﬁxture that has a louver composed of aluminum bafﬂes

curved in a parabolic shape. The resultant light distribution produced by this shape provides reduced glare, better

light control, and is considered to have greater aesthetic appeal.

PARACUBE: A metallic coated plastic louver made up of small squares. Often used to replace the lens in an installed

troffer to enhance its appearance. The paracube is visually comfortable, but the luminaire efﬁciency is lowered. Also

used in rooms with computer screens because of their glare-reducing qualities.

PHOTOCELL: A light sensing device used to control luminaires and dimmers in response to detected light levels.

PHOTOMETRIC REPORT: A photometric report is a set of printed data describing the light distribution, efﬁciency, and

zonal lumen output of a luminaire. This report is generated from laboratory testing.

POWER FACTOR: The ratio of the Vac x amps through a device to the ac wattage of the device. A device such as a

ballast that measures 120 volts, 1 amps, and 60 W has a power factor of 50% (volts x amps = 120 VA, therefore

60 W/120 VA = 0.5). Some utilities charge customers for low power factor systems.

PREHEAT: A type of ballast/lamp circuit that uses a separate starter to heat up a ﬂuorescent lamp before high

voltage is applied to start the lamp.

QUAD-TUBE LAMP: A compact ﬂuorescent lamp with a double twin tube conﬁguration.

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Crestron Lighting Design Guía de instalación Pagina 77