[Ord. No. 21-059, 7-6-2021]
A. BACKLIGHT-UPLIGHT-GLARE (BUG) CUTOFF FIXTURE FLOOD LAMP FLOOD LIGHT FOOTCANDLE (FC) FULL CUTOFF FIXTURE GLARE LIGHT FIXTURE LIGHT SOURCE LIGHT SPILLOVER LUMEN ON-SITE LIGHTING SEMI-CUTOFF FIXTURE
Definitions. Except where otherwise indicated by the context, the following definitions shall apply in the interpretation and enforcement of this Chapter:
A luminaire classification system that classifies backlight (B), uplight (U), and glare (G). This rating system provides for more effective control of unwanted light.
An outdoor light fixture shielded or constructed in such a manner that no more than two and one half percent (2.5%) of the total light emitted by the fixture is projected above the horizontal plane of the fixture.
A form of lighting designed to direct its output in a specific direction with a reflector formed from the glass envelope of the lamp itself. Such lamps are so designated by the manufacturers and are typically used in residential outdoor area lighting.
A form of lighting designed to direct its output in a different use, more or less specific direction, with reflecting or refracting elements located external to the lamp.
A quantitative unit measuring the amount of light cast onto a given point, measured as one (1) lumen per square foot.
An outdoor light fixture shielded or constructed in such a manner that it emits no light above the horizontal plane of the fixture.
The effect produced by a light source within the visual field that is sufficiently brighter than the level to which the eyes are adapted, to cause annoyance, discomfort, or loss of visual performance and ability.
An electrical device that contains an electric lamp that provides illumination consisting of a fixture body and one (1) or more lamps.
The element of a lighting fixture that is the point of origin of the lumens emitted by the fixture.
The light that can be measured on a property when that same light is generated from another property.
A quantitative unit measuring the amount of light emitted by a light source.
All lighting that is not owned, installed, or maintained by a public utility located on properties that are not primarily a single-family residential use and/or two-family residential use. This shall include but not be limited to the following: site or buildings, neighborhood common areas such as club houses, pools, and parking lots.
An outdoor light fixture shielded or constructed in such a manner that it emits no more than five percent (5%) of its light above the horizontal plane of the fixture, and no more than twenty percent (20%) of its light ten degrees (10°) below the horizontal plane of the fixture.
B.
Purpose. The purpose of this Section is to regulate the placement and arrangement of all on-site lighting as defined in this Section. These regulations are intended to:
1.
Protect the public health, safety, and general welfare;
2.
Enable the fair and consistent enforcement of these regulations;
3.
Control light spillover and glare to reduce the degradation of the sky from light pollution;
4.
Encourage lighting systems which conserve energy and costs;
5.
Preserve community character; and
6.
Provide for nighttime safety, utility, security, and productivity.
C.
Application Of Dark Skies Design Standards. All on-site lighting shall meet or exceed the Dark Skies Design Standard provisions in this Section.
D.
Exterior Lighting Objectives. Lighting arrangements shall be arranged in the following manner:
E.
Lighting Measurements. Light levels shall be measured in the following manner:
F.
Exterior Lighting Standards. All exterior on-sight lighting shall be subject to the following conditions and limitations:
Light Source | Maximum Mounting or Pole Height | Maximum Lumination | |
|---|---|---|---|
No cutoff | 15 feet | • | 3/10 footcandle at any point along perimeter adjoining single- or two-family residential use |
• | 3/10 footcandle if separated from single- or two-family residential use by a right-of-way of 70 feet or less | ||
Total cutoff of light at an angle so that the bare bulb, lamp, or light source is completely and opaquely shielded from the direct view of an observer at ground level at the perimeter of the property | 60 feet | • | 1/2 footcandle at any point along perimeter adjoining single- or two-family residential use |
• | 1/2 footcandle if separated from single- or two-family residential use by a right-of-way of 70 feet or less | ||
• | One (1) footcandle at any other point along the perimeter of the property. | ||
• | There are no maximum lumination limits at the property line of the same zoning classification | ||
Building and landscape light fixtures, including ground lighting for signs, flagpoles and statues, shall be equipped with shields or shutters to minimize light spillover | • | 1/2 footcandle at any point along perimeter adjoining single- or two-family residential use | |
• | 1/2 footcandle if separated from single- or two-family residential use by a right-of-way of 70 feet or less | ||
• | One (1) footcandle at any other point along the perimeter of the property | ||
Parking Lots | • | Average of five (5) footcandles | |
Downtown Neighborhood and Core Overlay Districts | • | Shall not exceed a color temperature of 3000 Kelvin | |
Bufferyard | N/A | • | Light sources shall not be located within bufferyard areas except on pedestrian walkways |
There shall be no lighting of a blinking, flashing, rotating, or fluttering nature, including changes in light intensity, brightness, or color except for public safety purposes. | |||
Luminaire | Maximum Allowed Backlight Rating | Maximum Allowed Uplight Rating | Maximum Allowed Glare Rating | Maximum Allowed Glare Rating *If NOT mounted with backlight perpendicular to property line within 2X mountings heights |
|---|---|---|---|---|
Greater than 2 mounting heights from property line | B4 | U2 0% Allowed light emission above 90° for street or area lighting | G2 | G2 |
1 to less than 2 mounting heights from property line and the backlight portion of light output oriented perpendicular and toward said property line. | B3 | U2 0% Allowed light emission above 90° for street or area lighting | G2 | G1 |
0.5 to 1 mounting heights from property line and the backlight portion of light output oriented perpendicular and toward said property line. | B2 | U2 0% Allowed light emission above 90° for street or area lighting | G2 | G0 |
Less than 0.5 mounting height to property line and the backlight portion of light output oriented perpendicular and toward said property line. | B0 | U2 0% Allowed light emission above 90° for street or area lighting | G2 | G0 |
1.
A site lighting plan for on-site lighting shall be submitted and shall provide the following information:
a.
Proposed location on premises of all exterior light fixtures;
b.
Description of illumination devices, fixtures, lamps, supports, reflectors and lens, mounting height and wattage;
c.
Photometric design layout for the site of all illuminated vertical and horizontal surfaces showing the design footcandle levels.
d.
Lighting shall be significantly reduced during non-operational hours, allowing only lighting necessary for security purposes. The site lighting plan submitted for review shall note where this distinction occurs.
2.
Signs not internally lit shall comply with exterior or building lighting standards provided above.
G.
Existing Lighting. Any existing lighting fixture that is moved or replaced in its entirety, shall meet the requirements of this Section. Specifically, this shall not include replacing bulbs or bulb maintenance.
H.
Exemptions. The following shall be exempt from the Dark Skies Design Standards contained in this Section:
1.
Emergency Lighting. Emergency lighting that is only turned on in the event of a power failure or when an alarm is activated is excluded from the total lumen calculations for the site. Use of such lighting outside of an emergency is strictly prohibited.
2.
Emergency Services Lighting. Searchlights, floodlights, laser source lights, strobe or flashing lights, or any similar high intensity lights are permitted for use by police, fire, medical, or utility personnel or at their direction.
3.
Infrared Security Lighting. Lights emitting infrared radiation for remote security systems is permitted with the following restrictions:
4.
Outdoor Recreational Uses. Ball diamonds, playing fields, and tennis courts due to their unique requirements for nighttime visibility and their limited hours of operation, but must comply with the following conditions:
a.
Illuminating Engineering Society (IES) lighting guidelines (RP-6) are followed according to the appropriate class of play; and
b.
Field lighting is provided exclusively for illumination of the surface of play and viewing stands, and not for any other applications; and
c.
Illuminance levels must be adjustable based on the task (e.g., active play vs. field maintenance); and
d.
Off-site impacts of the lighting will be limited to the greatest practical extent possible; and
e.
A strict curfew of 10:00 p.m. or one (1) hour after the end of play is observed; and
f.
Timers must be installed to prevent lights being left on accidentally overnight by automatically extinguishing them.
5.
Temporary seasonal/holiday lighting from one (1) month before and one (1) month after a Federally observed holiday. Low voltage holiday lighting, whether shielded or unshielded that does not create a hazard or nuisance to surrounding businesses or residences. Permanently exposed string lights are permitted as a white light clear bulb as accent lighting. Permanent lighting shall not consist of blinking or chasing lights, and shall be tightly fastened to the building.


