§ 8109-4.7.4. General standards.

All luminaires installed or replaced after November 1, 2018 shall comply with the following standards and requirements:

a.

Shielding and Direction of Luminaires. All outdoor luminaires shall be fully shielded, directed downward, and installed and maintained in such a manner to avoid light trespass beyond the lot line in excess of those amounts set forth in Section 8109-4.7.4(i) below. Lights at building entrances, such as porch lights and under-eave lights, may be partially shielded.

b.

Lighting Color. The correlated color temperature of each outdoor luminaire, except those used for security lighting (see Section 8109-4.7.4(e)), shall not exceed three thousand (3,000) kelvin.

c.

Maximum Lumens Per Luminaire. Each outdoor luminaire, except those used for security lighting and outdoor recreational facility lighting, shall have a maximum output of eight hundred fifty (850) lumens. (See Section 8109-4.7.4(e) for standards regarding security lighting, and Section 8109-4.7.4(g) for standards regarding outdoor recreational facility lighting.)

d.

Dark Hours. All outdoor luminaires, other than an essential luminaire, shall be turned off from 10:00 p.m., or when people are no longer present in exterior areas being illuminated, or the close of business hours, whichever is latest, until sunrise.

e.

Security Lighting.

(1)

Outdoor luminaires used for security lighting shall not exceed a maximum output of two thousand six hundred (2,600) lumens per luminaire.

(2)

Where the light output exceeds eight hundred fifty (850) lumens, motion sensors with timers programmed to turn off the light(s) no more than ten (10) minutes after activation must be used between 10:00 p.m. and sunrise. The foregoing does not apply to security lighting used for agricultural operations conducted on parcels within the Agricultural Exclusive (AE), Open Space (OS), and Rural Agricultural (RA) zones.

(3)

Where security cameras are used in conjunction with security lighting, the lighting color may exceed three thousand (3,000) kelvin but shall be the minimum necessary for effective operation of the security camera.

f.

Parking Area Lighting. Parking area lighting shall comply with the standards set forth in Section 8108-5.12, and is not subject to any other standard set forth in this Section 8109-4.7.4.

g.

Outdoor Recreational Facility Lighting.

(1)

Outdoor recreational facility lighting may exceed eight hundred fifty (850) lumens and three thousand (3,000) kelvin per luminaire. Lighting levels for these facilities shall not exceed those recommended in the Lighting Handbook available online by the Illuminating Engineering Society of North America (IESNA) for the class of play (Sports Class I, II, III or IV).

(2)

In cases where fully-shielded luminaires would cause impairment to the visibility required for the intended recreational activity, partially-shielded luminaires and directional lighting methods may be utilized to reduce light pollution, glare and light trespass.

(3)

With the exception of security lighting as specified in Section 8109-4.7.4(e), and parking area lighting as specified in Section 8108-5.12, outdoor recreational facilities shall not be illuminated between 10:00 p.m. and sunrise, except to complete a recreational event or activity that is in progress as of 10:00 p.m.

(4)

See Section 8109-4.7.4(j) for additional lighting requirements for outdoor recreational facilities, by zone.

(5)

The lighting system design (including lumens, Kelvin, etc.) shall be prepared by a qualifying engineer, architect or landscape architect, in conformance with this Section 8109-4.7.

(6)

The proposed lighting design shall be consistent with the purpose of this Section and minimize the effects of light on the environment and surrounding properties.

h.

Service Station Lighting. All luminaires mounted on or recessed into the lower surface of the service station canopies shall be fully shielded and utilize flat lenses. No additional lighting is allowed on the columns of the service station.

i.

Allowable Light Trespass. Outdoor lighting shall conform to the quantitative light trespass limits shown in Table 1 below, measured from the property line illuminated by the light source. The more restrictive zone will apply. For example, when a commercial zone abuts a single-family residential zone, the light trespass limit shall be 0.1 foot-candles at the property line.

Table 1 Quantitative Light Trespass Limits, by Zone
Open Space, Agriculture and Special Purpose Zones (such as OS, AE, TP)
Horizontal-plane limit	0.1 foot-candles at property lines
Vertical-plane limit
Rural Residential and Single-family/Two-family Residential Zones (such as RA, RE, RO, R-1, R-2)
Horizontal-plane limit	0.1 foot-candles at property lines
Vertical-plane limit
Multi-family Residential Zones (such as RPD)
Horizontal-plane limit	0.2 foot-candles at property lines
Vertical-plane limit
Commercial and Industrial Zones (such as C-O, C-1, CPD, M-1, M-2, M-3)
Horizontal-plane limit	0.25 foot-candles at property lines, unless otherwise approved by PD or CUP
Vertical-plane limit

 

 

j.

Maximum Height Allowance:

(1)

Luminaires affixed to structures for the purpose of lighting outdoor recreational facilities (such as for equestrian arenas, batting cages, tennis courts, basketball courts, etc.) shall not be mounted higher than fifteen (15) feet above ground level. In cases where luminaires are affixed to fences, the top of the fixture shall not be higher than the height of the fence.

(2)

Freestanding light fixtures used to light walkways, driveways, or hardscaping shall utilize luminaires that are no higher than two (2) feet above ground level. Freestanding light fixtures used for commercial and industrial uses shall comply with subsection (j)(3) below.

(3)

All other freestanding light fixtures shall not be higher than twenty (20) feet above ground level, unless specifically authorized by a discretionary permit granted under this Chapter.

k.

Night Lighting for Translucent or Transparent Enclosed Agriculture Structures. All night lighting within translucent or transparent enclosed structures used for ongoing agriculture or agricultural operations (e.g., greenhouses for crop production) shall use the following methods to reduce sky glow, beginning at 10:00 p.m. until sunrise:

(1)

Fully- or partially-shielded directional lighting; and

(2)

Blackout screening for the walls and roof, preventing interior night lighting from being visible outside the structure.

(Ord. No. 4528, § 5, 9-25-2018)