Definitions. As used in this section, the following terms shall have the meanings indicated:
FIXTURE HEIGHT
The distance from the top of the light fixture to the ground level at the base of the light pole.
FOOTCANDLE
Standard unit of measure for illuminance on a given area. Specifically, this represents a value of one lumen per square foot of illuminance. All footcandles referenced in this section are initial footcandles and not maintained footcandles.
FULLY SHIELDED
Outdoor luminaires shielded or constructed so that all of the light rays emitted by the fixture are projected below a horizontal plane passing through the lowest point of the fixture. Refer to IESNA guidelines. These guidelines specifically state that the candlepower per 1,000 lumens does not numerically exceed 2.5% at an angle of 90° above (nadir) horizontal and 10% at a vertical angle of 80° above nadir. Dropped or sagged lens fixtures shall not be permitted.
GLARE or DIRECT GLARE
Light directly visible to a viewer's eye, either directly from a light source or reflected or refracted from the light source.
HORIZONTAL FOOTCANDLE (HFE)
The illuminance measured on a horizontal surface.
IESNA
Illumination Engineering Society of North America.
INITIAL FOOTCANDLE
Illuminance of light when new light fixtures and new lamps are energized. No dirt buildup is present and no use of maintenance factors applied to lighting calculations.
LIGHT TRESPASS (SPILL LIGHT)
Unwanted light received in areas beyond the property line of the illuminated area.
LUMINAIRE
The complete assembly of a light fixture that includes the lamp, lamp housing, poles, mounting brackets and all other accessories. The term "fixture" or "lighting fixture" when used shall also mean "luminaire."
MAINTAINED FOOTCANDLE
Illuminance of light adjusted for maintenance factor accounting for dirt buildup.
OUTDOOR LIGHT FIXTURES
Artificial illuminating devices that are used for illumination or advertisement, These devices may be utilized on a temporary or permanent basis. Areas used include, but are not limited to, the descriptions below:
(2)
Recreational areas such as fields, parks, stadiums or playgrounds.
(3)
Building facades, canopies or overhangs.
RESIDENTIAL PROPERTY OR PROPERTY LINE
The property line of an individual property where individual lots exist or the perimeter property line of the overall residential development where there are no individual lots.
VERTICAL FOOTCANDLE
The amount of illuminance measured on a vertical surface.