Principal Use Types | Minimum Illumination in Vehicular Use Areas 1 | Maximum Illumination at Property Line 2 |
Single-family residential | 0.5 foot-candle
|
1.0 foot-candle
|
Multifamily residential | 0.5 foot-candle
|
2.0 foot-candles
|
All other | 1.0 foot-candle
|
3.0 foot-candles
|
NOTES: 1. Measured at the edge of a vehicular use area, at ground level. 2. Measured at five feet above ground level | ||
F. Hours of Illumination
1. All exterior lighting not necessary for security or emergency purposes shall be reduced, activated by motion sensors, or turned off during no-operating hours.
2. For the purposes of this subsection, lighting "necessary for security or emergency purposes" shall be construed to mean the minimum amount of exterior lighting necessary to illuminate possible points of entry or exit into a structure, to illuminate exterior walkways, or to illuminate outdoor storage areas. Such lighting may be activated by motion sensor devices.
G. Illumination Direction and Shielding
1. Upwardly-directed lighting used to illuminate all or part of a structure or building facade shall use low-wattage architectural or decorative lighting so that direct light emissions are contained by the structure or facade and not be visible above the building roof line.
2. Light fixtures used to illuminate flags, statutes, or other objects mounted on a pole, pedestal, or platform shall use a narrow cone beam of light that does not extend beyond the illuminated object.
3. Any light source forming a lineal pattern shall be recessed within the structure in which it is located.
4. Any light source or lamp that emits more than 900 lumens shall be concealed or shielded with full cut-off style fixture with an angle not exceeding 90 degrees to minimize glare and unnecessary light diffusion onto adjacent properties and streets. (See Figure 155.5401.G: Shielding of light source to avoid light diffusion onto adjacent property.)
H. Flickering or Flashing Lights
No flickering or flashing exterior lights shall be allowed except for temporary decorative seasonal lighting.
I. Wall Pack Lights
Wall packs on buildings may be used at entrances to a building to light unsafe areas. They are not intended to draw attention to the building or provide general building or site lighting. Wall packs on the exterior of the building shall be fully shielded (e.g., with true cut-off type bulb or light source not visible from off-site) to direct the light vertically downward and have a light output of 900 lumens or less.
J. Exemptions for a Security Plan
Government maintenance facilities, public safety facilities, parks and public spaces, and other uses where sensitive or dangerous materials are stored may submit to the Development Services Director a site security plan proposing exterior lighting that deviates from the standards in this subsection. The Development Services Director shall approve, or approve with conditions, the site security plan and its proposed deviation from the standards of this subsection, on finding that:
1. The proposed deviation from the standards is necessary for the adequate protection of the public;
2. The condition, location, or use of the land, or the history of activity in the area, indicates the land or any materials stored or used on it are in significantly greater danger of theft or damage, or members of the public are at greater risk for harm than on surrounding land; and
3. The proposed deviation from the standards is the minimum required, and will not have a significant adverse effect on neighboring lands.
K. Illumination of Outdoor Sports Fields and Performance Areas
Lighting of outdoor sports fields and performance areas shall comply with the following standards:
1. Glare Control Package
All lighting fixtures shall be equipped with a glare control package (e.g., louvers, shields, or similar devices) and aimed so that their beams are directed and fall within the primary playing or performance area.
2. Hours of Operation
The hours of operation for the lighting system for any game or event shall not continue more than one hour after the end of the game or event.