A.Purpose The purpose of this subsection is to promote public safety, nighttime vision, natural-resource conservation, community values, and aesthetics by establishing standards for the design and application of outdoor lighting sources and fixtures for nighttime use.
Accordingly, the specific regulatory objectives of this subsection are as follows:
1.Promote nighttime visibility by directing appropriate levels of illumination upon intended targets.
2.Redress the disabling visual effects of glare and excessive illumination, and the extreme contrasts between brightly lighted areas, and the lower ambient levels of adjacent areas.
3.Limit light trespass across property lines and its intrusive and devaluing effects upon nearby private and public property.
4.Protect air and water quality and conserve natural resources.
5.Limit light pollution for the following purposes:
a.Restore natural cycles of light and dark to the indigenous natural environment, thereby redressing a cause of impaired vegetative growth and wildlife habitat; and
b.Darken the night sky by reducing the unnecessary transmission of upward light, both directly from an unshielded light source and indirectly from ground-level reflections of excessive downward light.
B.Applicability New or altered installation. Except as specified otherwise, the provisions of this subsection apply to all affixed (non-mobile) outdoor lighting fixtures as follows:
1.Fixtures newly permitted and installed after the effective date of this subsection;
2.Existing fixtures if electrically altered with respect to lamp type to provide an increase in wattage, or lumen output, or if structurally modified, replaced, repaired, or relocated after the effective date of this ordinance; and
3.All fixtures illegally installed at any time.Approved 11.13.2024
4.Any lighting, existing or new, must comply with this subsection when proposed in association with additional structural or site improvement square footage added to an existing structure or site improvement in any district that is greater than 25 percent of the existing building square footage for structural improvements or 25 percent of the existing site improvement square footage for site improvements.
C.Resumption of Use after Abandonment Any non-conforming lighting structure or any building utilizing non-conforming lighting structures that are abandoned or discontinued for a period of six consecutive months shall be reviewed and brought into compliance with this subsection before use of the structure or its site is permitted to be resumed.
D.Outdoor Lighting Standards.
1.Glare and Directional Control.
a.Full shielding required.
All outdoor lighting fixtures shall be horizontally cut-off or otherwise fully shielded and shall comply with the terms of this subsection with respect to lighting intensity, glare, and trespass, except as specified otherwise herein.
b.Non-constant lighting exception.
Full shielding is not required for non-constant fixtures, provided all of the following conditions are met:
i.Fixture is top-shielded; and
ii.Spot- or flood-light fixtures have centerline beam aimed no more than 45 degrees above the horizontal plane.
c.Diffused-light exception in residential zones Full shielding to control glare and light trespass is not required in residential zones, provided the fixture is top shielded, emits its light through a frosted, matte, or other translucent, light-diffusing material.Approved 11.13.2024
d.There shall be no exceptions for diffused-light in non-residential zones.
e.Upward-light, excluding sign illumination.
Full shielding to control glare is required for illumination of architectural elements, building facades, landscaping features, commercial displays, or other vertical structures, and shall meet the following light-containment standards:
i.The source of the light shall be located in such a way that no pedestrian ways are located between the light source and the targeted area. An exception would be when the light source is not visible from a pedestrian way.
ii.All light from an upward-directed fixture shall be contained from projecting beyond the targeted surface, such as by a building façade, roof overhang, or landscape feature, and the light source shall not be visible from any roadway or adjacent property.
iii.When total light output for all upward-directed fixtures exceeds 2,200 lumens per application, a permit shall be required for which the applicant shall provide manufacturer specifications, photometric, or other evidence demonstrating compliance with the provisions of this subsection.
f.Light Standards in Parking Lots.
i.Pole- aluminum or fiber glass; black, direct buried or base mounted 40 feet mounting height or less.
ii.Luminary- black exterior, LED, 4000k color or lower.
2.Light Trespass.
The following light-trespass standard shall apply to all outdoor fixtures not located within a public right-of-way.
a.The standard can be achieved by means of fixture design, metal shielding, lamp type and lumen output, mounting height, location, or natural or constructed barriers on the subject property.Approved 11.13.2024
b.Outdoor-lighting fixtures shall be shielded such that light of 1 foot-candle or greater is not transmitted over the property line of the subject property by more than 10 feet in residential zones, by no more than 20 feet in any other zone, or to the wall of the nearest structure on the immediately adjacent property is located at a distance that is less than those listed in this subsection.
3.Intensity of Illumination.
Outdoor sites shall not be illuminated in excess of the standards for lighting levels specified in Table 603.D.3.1. for specific zones and classes of use or application, measured in foot-candle units, and based upon the initial lumen-output rating of the fixture lamps. Compliance shall be demonstrated by detailed descriptions, specifications, and photometric plans or studies, as determined by the Zoning Administrator.
Table 603.D.3.1. Maximum Allowable Light Standards.
For classes of outdoor use, in foot-candles (fc) by zoning districts, based upon initial lumen-output rating of fixture lamps.
Table 603.D.3.1. Maximum Allowable Light Standards.
| Class of Use or Application | Residential Zones | Commercial and Industrial Zones |
|---|
| Building entries, retail sales and merchandise display areas | 8 fc | 14 fc |
| Parking areas and parking structures | 4 fc | 6 fc |
| Non-dedicated or private roadways | 4 fc | 6 fc |
| Pedestrian walkways | 2 fc | 3 fc |
| Structural facades and monuments | 6 fc vertical | 10 fc vertical |
| Landscaping features | 2 fc vertical | 3 fc vertical |
| Common open space | 1 fc | 1 fc |
| Sign faces exceeding 32 square feet, illuminated from below with upwardly directed fixtures | 40 fc vertical | 60 fc vertical |
| Under canopies and drive-through facilities | 8 fc | 25 fc |
Under canopies and drive-through facilities 8 fc 25 fcApproved 11.13.2024
4.Sign Illumination Except as otherwise specified herein, the following provisions shall apply to all outdoor signs, advertising billboards, or other commercial or informational displays.
a.External illumination of outdoor signs shall be designed and installed to meet the glare and trespass objectives of this subsection, and so that the light source is not visible from any roadway or adjacent property.
5.Specific Exceptions Specific exemptions to the standards of this subsection shall apply to the following applications but should be implemented in a manner consistent with the general purposes of this subsection.
a.Temporary lighting for occasional events, such as outdoor sporting contests, concerts, theater, festivals, carnivals, social gatherings, celebrations, special promotions, or similar occasional events not exceeding a time period of five days and permitted by the City of Lawrenceville.
b.Celebratory lighting for seasonal and holiday observances that does not violate the prohibitions of Subsection D.7. Prohibitions.
c.Flags of the United States and the State of Georgia are encouraged to be flown only during daylight hours, but nighttime display of flags is permitted, provided illumination is by no more than two spotlight fixtures not exceeding 3,000 lumens in total. The spotlight can be either a direct burial ground fixture or a pole-mounted fixture, aimed upward and placed as close to the flag as reasonably possible. Wall-mounted fixtures are permissible, with the same maximum wattage. All fixtures should be mounted such that the light source is not visible from pedestrian pathways.
d.Decorative architectural lighting and fixtures, such as acorn or lantern styles and Edison bulb style string lighting, are permitted, provided that the:
e.Electrical draw does not exceed 75 watts; and
f.Upward-emitted light is refractive only, not direct, and does not exceed 2% of their total light output.
g.Neon or other luminous-tube lighting shall be illuminated only during the operating hours of the associated use or business but is otherwise exempt from the provisions of this subsection.Approved 11.13.2024
h.Safety lighting is exempt from the provisions of this subsection, provided it is required for aviation, navigation, tower identification, vehicular-traffic control, emergency response, or any other governmental purpose related to public safety.
i.Contingency lighting is exempt from the provisions of this subsection, provided it is for public emergencies or construction activities authorized by a government agency; such illumination is temporary; and its duration does not extend beyond the period of the permitted activity.
6.Flood and Spotlight Fixtures: Directional Adjustments.
a.Vertical angle of illumination.
The directional angle of light from applicable fixtures shall be vertically downward, or above the vertical plane at an inclination angle not to exceed 45 degrees.
b.Horizontal angle of illumination adjacent to public roadways.
i.Applicable fixtures within 100 feet of a public right-of-way shall also conform to either of the following glare-abatement standards:
1.The light-trespass provisions of this subsection; or
2.The fixture's directional axis of light shall be away from the nearest roadway and aimed on a horizontal plane at an angle from the roadway not less than 45 degrees, or 90 degrees minus the distance (in feet) between the fixture's location and the right-of-way, whichever is greater.
ii.In instances where multiple roadways are impacted by a fixture's glare, the Zoning Administrator shall determine the appropriate horizontal angle, shielding, or other remedy that maximizes public safety.
7.Prohibitions
a.Except for uses specifically permitted elsewhere herein, the following applications of outdoor lighting shall be prohibited and shall be in violation of this subsection:Approved 11.13.2024
b.Light, which is flashing, pulsing, moving, rotating, flickering, chasing, or changing in intensity or color;
c.Searchlights, beacons, laser-source, or other high-intensity lights;
d.Bare lamps with illumination ratings exceeding 50 lumens, or 20 lumens if clear glass, that are not housed and protected within a light fixture, and are visible anywhere from beyond the property on which they are located;
e.Fixtures that may be confused with or construed as traffic-control or other public-safety device;
f.Lighting found by reason of attraction, intensity, glare, or trespass to be a public-safety hazard that rises to the level of a public or private nuisance;
g.Installation, repair, or lamp replacement of any mercury-vapor light fixture.
E.Accent Lighting Accent lighting for all buildings in all zoning classifications other than AR, RS-180, RS-150, RS-60, and RM shall be limited as follows:
1.Temporary accent lighting shall be allowed beginning November 15t h of each year but shall be removed by January 15t h of the following year.
2.Permanent accent lighting shall be prohibited except as allowed under 603.D, Outdoor Lighting Standards.Approved 11.13.2024