Adequate lighting shall be provided to ensure
safe movement of persons and vehicles and for security purposes.
Lighting shall be located along roadways, in
parking areas, at intersections and where various types of circulation
systems merge, intersect, or split. Stairways and sloping or rising
paths shall be illuminated, along with building entrances and exits.
A.
Roadway lighting shall be provided in accordance with
a plan designed by the utility company, or using as a guideline the
standards set forth by IES Lighting Handbook.
B.
Parking lots should be given a fairly uniform lighting
pattern with a design average of at least 1.0 footcandles throughout
the lot. Standards upon which lights are placed should be spaced at
a distance approximately equal to four times their height.
C.
Intersecting, converging and diverging roadway areas
at grade require higher illumination. The illumination in these areas
should be at least equal to the sum of the illumination values provided
on the roadways which form the intersection.
D.
The lowest footcandle value at any point on the pavement
should not be less than 1/3 the average value. The only exception
to the requirement applies to residential roadways, where the lowest
footcandle value at any point may be as low as 1/6 the average value.
E.
Spotlights or other types of artificial lighting used
to illuminate signs or building faces shall not emit beams of light
that extend beyond the vertical plane of the sign or building face
that they illuminate and shall not be located in such a manner as
to cause the beams of light to be reflected upon any adjoining property,
public street or vehicular circulation area.
A.
Illumination fixtures shall be arranged and installed
to minimize glare on and into dwellings. All fixtures except incandescent
fixtures of less than 100 watts shall conform with the following:
(1)
Directional lights shall be arranged so that the illumination
source is not visible from any dwelling.
(2)
Fixtures should be shielded to restrict the maximum
apex angle at the core illumination to 150º.
(3)
Lights should not be located on buildings and aimed
outward but should point toward the structures.
(4)
Pathways, sidewalks and trails should be lit using
low or mushroom-type standards. Any poles should be less than 12 feet
high.
B.
Pole-mounted lighting for roadways and parking areas
should conform with the following:
