Definitions. Listed below are certain words and phrases cited in this Code with their intended meanings.
DIRECT LIGHT
Light emitted directly from the lamp, off the reflector or reflector diffuser or through the refractor or diffuser lens of a luminaire that is emitted in the general direction of the surface to be illuminated. The term usually refers to light emitted in a downward direction.
DIRECTIONAL DISTRIBUTION LAMP
Any of several different types of lamps which use an integral reflector and, usually, a glass cover which together provides optical control (PAR, MR and R type lamps fall within this category).
ENCLOSED
Any outdoor light fixture which has a glass, acrylic, polycarbonate or screen enclosure of the light source (quartz glass does not meet this requirement) which provides mechanical protection from lamp shattering.
FIXTURE
The assembly that houses the lamp or lamps and can include all or some of the following parts: a housing, a mounting bracket or pole assembly, a lamp holder, a ballast, a reflector or mirror and/or a refractor or lens.
FIXTURE CENTER LINE
For any light source installed above the ground, the path of direct light emitted from the lamp when the lamp is aimed directly downward [e.g., ninety degrees (90°) perpendicular] to the ground.
FLOODLIGHT LUMINAIRE
Any of several different types of luminaires with relatively wide beam angles [greater than thirty degrees (30°)].
GLARE
Light emitting from a luminaire with such intensity that it is great enough to reduce the viewer's ability to see and, in extreme cases, cause aversion of vision or momentary blindness.
HEIGHT OF LUMINAIRE
The height as measured by the vertical distance from the ground directly below the center of the luminaire to the lowest direct light emitting part of the luminaire.
IES
The Illumination Engineering Society of North America.
INDIRECT LIGHT
Direct light that has been reflected or has scattered off other surfaces, such that the viewer perceives light from a source other than the original lamp source.
INSTALLED
The attachment or assembly fixed in place, whether or not connected to a power source, of any outdoor light fixture.
LAMP
The component of luminaire that produces the actual light, commonly known as the "bulb" or "light bulb."
LIGHT TRESPASS
The shining of light produced by a luminaire beyond the boundaries of the property for which it is intended to be directed.
LUMEN
A unit of luminous flux. One (1) foot-candle is one (1) lumen per square foot. For the purposes of this Code, the "lumen output values" shall be the initial lumen output ratings of a lamp (see Appendix A).
LUMINAIRE
A complete lighting system and includes a lamp or lamps and a fixture.
OUTDOOR LIGHT FIXTURE
Outdoor electrically powered illuminating devices, outdoor lighting or reflective surface lamps and similar devices, permanently installed or portable, used for illumination or advertisement. Such devices shall include, but are not limited to, search, spot and street lights and floodlights for:
1.
Buildings and structures;
5.
Billboards and other signs (advertising or other);
7.
Product display area lighting;
8.
Building overhangs and open canopies; and
9.
Paths, trails and walkways.
PERSON
Any individual, tenant, lessee, owner or any commercial entity including, but not limited to, firm, business, partnership, joint venture or corporation.
SELF-EXTINGUISHING
A fixture in which power to the lamp spontaneously ceases, if the lamp is accidentally shattered or broken.
SHIELDED, PARTIALLY
Outdoor light fixtures shielded or constructed so that the lower edge of the shield is at or below the center line of the light source or lamp so as to minimize light emission above the horizontal plane.
SHIELDING
A light fixture whose output is controlled in such a manner that a direct view of the light emitting surface from an adjacent property is either minimized or prevented. This control could be as a result of the fixture housing, external or internal control devices (louvers, shields, barn doors, etc.), placement of the luminaire on the subject property or the combination of these elements. Shielding may either be full or partial.
SINGLE-FAMILY DWELLING
A building designed and used primarily for a single family. This term shall also include accessory residential structures, barns and other agricultural buildings associated with a single-family dwelling.
SPILL LIGHT
Any shining of light produced by a luminaire beyond the boundaries of the area which it is intended to illuminate.
SPOT LUMINAIRE
Any of several different types of luminaires with relatively narrow beam angles [less than thirty degrees (30°)] designed to illuminate a specifically defined area.
UPLIGHT
Any lamp or fixture projecting its direct light emission to a plane or region higher than the lamp source (above the horizontal), regardless of the fixture mounting position.