All private outdoor lighting shall be in conformance with the
requirements of this article.
Shielding requirements shall be as follows:
Fixture/Lamp Type
|
Shielding Required
|
---|
Low-/high-pressure sodium, metal halide and fluorescent over
50 watts
|
Fully
|
Incandescent over 160 watts
|
Fully
|
Incandescent 160 watts or less
|
None
|
Fossil fuel
|
None
|
Any light source of 50 watts or less
|
None
|
The following exceptions shall apply:
A. Holiday lights for a maximum of 60 days per calendar year.
B. Any spot or flood luminaire having initial source lumens of 900 or
less, provided that no direct light is focused so as to cause avoidance
glare on adjoining property or roadways. Such luminaire may be redirected
or its light output controlled so as to eliminate this glare and be
eligible for exemption under this section.
C. Temporary circus, fair, carnival or civic uses.
D. Construction or emergency lighting, provided that such lighting is
temporary and is discontinued immediately upon completion of the construction
work or abatement of the emergency necessitating said lighting.
F. Lighting associated with agricultural pursuits.
The following lighting shall be prohibited:
A. All moving, revolving and flashing lights.
C. Laser source lighting or any similar high-intensity light for outdoor
advertising or entertainment, when projected above the horizon.
All exterior lights and illuminated signs shall be designed,
located, installed and directed in such a manner as to prevent objectionable
light at (and glare across) the property lines and disability glare
at any location on or off the property. The maintained horizontal
illuminance recommendations set by the Illuminating Engineering Society
of North America (IESNA) shall be observed.
The visibility of the light source inside a luminaire is restricted
to the following:
A. Nonresidential zones. Direct light shall not be visible above six
feet at the adjoining public roadway pavement edge or 25 feet beyond
the property line, except no such restriction for lighting site entrances.
B. Residential zones and where adjacent property is in a residential
zone. Direct light shall not be visible above ground level at the
adjoining public roadway pavement edge or 25 feet beyond the property
line or at the dwelling unit, whichever is less, except no restriction
for lighting site entrances.
All luminaires whose initial source lumens are greater than
1,800 must meet the following requirements:
A. Have a cutoff angle of 90° or less.
B. Wall-pack units are required to be opaque shielded or have optics
that provide a cutoff angle of 70° or less.
C. Canopy lights must be recessed or have side shields.
Light trespass shall be limited to the following:
A. In all zoning districts, at the pavement edge of adjoining public
roads: a maximum of 0.5 footcandle, except for site access points,
where a maximum of one footcandle at the pavement edge is permitted.
B. Residential districts and where an adjacent property is in a residential
district: a maximum of 0.2 footcandle 25 feet beyond the property
line or at the dwelling unit, whichever is less.
C. Nonresidential districts: no maximum limit; however, light trespass
shall be based on adjoining uses and light levels to ensure that IESNA
standards are not exceeded.
All outdoor lighting lawfully existing prior to the effective
date of this chapter shall be deemed conforming to this article, except
that:
A. No replacement or installation of new luminaires shall be permitted
unless in conformance to this article.
B. All outdoor lighting that, in the opinion of the CEO, is causing
avoidance glare on adjoining roadways or properties shall be required
to submit lighting details to the Code Enforcement Officer showing
that the existing lighting meets the requirements of this article
or how such lighting will be brought into conformance.