The following lighting design standards and guidelines are provided
to ensure coordinated, safe, and nonintrusive functional lighting
systems in each neighborhood. The site lighting requirements include:
A. Standards.
(1) No use shall produce a strong
light or reflection of a strong, dazzling light or glare that extends
beyond the lot line.
(2) Security lighting fixtures
shall not project above the facade or roofline of any building and
are to be shielded. Lighting shields shall be painted to match the
surface to which they are attached. Security lighting fixtures shall
be restricted to lighting only the property owner's yard or other
similar areas requiring security lighting.
(3) Outside lighting shall be
contained within yard boundary. No light spillover shall occur outside
the yard area.
B. Guidelines.
(1) Soft lighting of building
facades is encouraged. Building lighting should be indirect in character.
Indirect wall lighting or "wall-washing" overhead down lighting or
interior illumination that spills outside the protected area is discouraged.
(2) When possible, overhead wiring
should be avoided.
As used in this chapter, the following terms shall have the
meanings indicated:
DIRECT LIGHT
Light emitted by a fixture from the lamp, from a reflector,
or through a refractor.
FACADE LIGHTING
Permanent outdoor fixtures that are specifically intended
to illuminate the exterior surfaces of buildings or structures.
FIXTURE
A complete lighting unit, including a lamp together with
the parts designed to distribute the light, to position and protect
the lamp and to connect the lamp to the power supply.
FOOTCANDLE (abbreviated fc, lm/ft2, or sometimes ft-c)
A.
A non-SI (SI= International System of Units) unit of illuminance
or light intensity. The name "footcandle" conveys the "illuminance
cast on a surface by a one-candela source one foot away." This unit
is commonly used in lighting layouts in parts of the world where SAE
units are used.
B.
The unit "footcandle" is defined as the amount of illumination
the inside surface of a one-foot-radius sphere would be receiving
if there were a uniform point source of one candela in the exact center
of the sphere. Alternatively, it can be defined as the illuminance
on a one-square foot surface of which there is a uniformly distributed
flux of one lumen.
FULLY SHIELDED FIXTURE
A fixture that allows no direct light from the fixture above
a horizontal plane through the fixture's lowest light-emitting part,
in its mounted position.
GLARE
Light emitted by a fixture that causes discomfort or reduced
visibility.
ILLUMINANCE
The luminous power incident per unit area of a surface.
LAMP
A light bulb or other component of a fixture that changes
electricity into visible light.
LIGHT TRESPASS
Light that falls beyond the property it is intended to illuminate.
LUMEN
A standard unit of measurement of the quantity of light emitted
from a lamp.
ORNAMENTAL ROADWAY LIGHTING
A roadway lighting fixture that serves a decorative function
in addition to a roadway lighting function, having an historical period
appearance or decorative appearance.
PARKING LOT LIGHTING
Permanent outdoor fixtures specifically intended to illuminate
uncovered vehicle parking areas.
ROADWAY LIGHTING
Permanent outdoor fixtures specifically intended to illuminate
public roadways.
SKY GLOW
A condition caused by light directed upwards or sideways,
reducing one's ability to view the night sky.
STATE AGENCY
Any state department, office, board, commission, agency or
a public authority or public benefit corporation, at least one of
whose members is appointed by the governor.
No property owner or lessee shall install or cause to be installed
any new or replacement permanent outdoor fixture unless the following
conditions are met:
A. In the case of roadway lighting
or driveway lighting; whether mounted to poles, buildings or other
structures, the fixture is fully shielded.
B. In the case of building-mounted
fixtures not specifically intended for roadway lighting, driveway
lighting, or facade lighting, the fixture is fully shielded when its
initial fixture lumens is greater than 3,000 lumens.
C. In the case of facade lighting,
the fixture is shielded to reduce glare, sky glow, and light trespass
to the greatest extent possible.
If a court determines that any clause, sentence, paragraph,
subdivision, or part of this chapter or the application thereof to
any person, firm or corporation, or circumstance is invalid or unconstitutional,
the court's order or judgment shall not affect, impair, or invalidate
the remainder of this chapter but shall be confined in its operation
to the clause, sentence, paragraph, subdivision, or part of this chapter
or in its application to the person, individual, firm or corporation
or circumstance directly involved in the controversy in which such
judgment or order shall be rendered.
This chapter shall take effect immediately upon filing with
the Secretary of State.