Definitions. As used in this article, the following terms shall have
the meanings indicated:
AVERAGE FOOTCANDLES
The average level of illuminance for a given area measured
at ground level with a light meter placed parallel to the ground.
FOOTCANDLE
The unit of measurement used to quantify the amount of light
falling on a surface. One footcandle is the illuminance produced by
a candle on a surface one foot square from a distance of one foot.
GLARE
A visual effect produced when a light source within the field
of view is brighter than the level to which the eyes are adapted.
Glare may cause annoyance, discomfort, loss of visual acuity, or momentary
blindness.
LAMP
A light bulb or other component of a fixture that changes
electricity into visible light.
LUMEN
The unit of measurement used to quantify the amount of light
produced by a lamp or emitted from a fixture (as distinct from "watt,"
which is a measurement of the electrical power). For the purposes
of this chapter, measurements in lumens shall refer to "initial lamp
lumens" (as opposed to "maintained lamp lumens") as rated by the manufacturer
when the lamp is new, as listed on the packaging.
NUISANCE LIGHTING
Any outdoor lighting that creates a potential hazard to the
public or light trespass or glare to neighboring properties, thereby
causing loss of enjoyment, comfort, or repose.
SHIELD OR SHIELDED
An opaque device that is attached to a light fixture to prevent
light from being emitted in certain directions.