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(1) Warm Lighting Requirements and Alternatives

a. All Class 2 lighting shall be either low-pressure sodium (LPS) lamps, narrow spectrum amber LEDs, or warm lighting alternatives not to exceed 2,700 Kelvin.

b. For Class 1 lighting, a development may be eligible for an additional 10 percent increase in the total lighting output level allowed pursuant to Table 5.8 if 50 percent or more of the Class 1 lighting complies with subsection 5.8.E(1)a.

(2) Prohibited Lighting Types

a. Prohibited Fixtures

1. Mercury vapor light bulbs and fixtures.

2. Lamps emitting a Correlated Color Temperature (CCT) in excess of 4,000 Kelvin.

3. Searchlights, laser source lights, strobe or flashing lights, illusion lights, or any similar high intensity light.

4. Unshielded lights.

b. Outdoor String Lighting (Ambience Lighting)

1. Permanent exposed string lighting for mixed-use and nonresidential uses is prohibited, except as allowed in subsection 5.8.E(2)b.2.

2. Ambience lighting for outdoor dining/bar areas, interior courtyards, and/or event venues, may be allowed subject to compliance with all other provisions of this Code and with approval by the Director on a case-by-case basis. In reviewing proposals for such lighting, the Director shall consider lighting types, locations, and time of use. Permanent outdoor string lighting shall not flash, blink, fade, or strobe and shall be included in the total partially shielded lumen count for the property. Such lighting, if allowed by the Director, shall be extinguished immediately after outdoor hours of operation.

(3) Shielding and Light Trespass

a. All light fixtures are required to be fully shielded, unless approved by the Director pursuant to Section 5.8.D(2)c. (See Figure 5-14.)

Figure 5-14: Fully Shielded Fixtures

fully shielded light fixtures

b. Partially shielded light fixtures approved by the Director as part of a lighting alternative pursuant to subsection 5.8.D(2)c are limited to a maximum of 3,850 initial lumens per net acre and shall not exceed 1,400 initial lumens per lamp.

c. All light fixtures shall be aimed and shielded so that the direct illumination shall be confined to the property boundaries of the source. Lighting shall not be aimed onto adjacent properties, except in cases of shared parking, shared pedestrian pathways, or for coordinated development sites spanning multiple parcels.

d. Light trespass onto adjacent public rights-of-way may be allowed subject to approval of the Director pursuant to subsection 5.8.D(2)c.

(4) Lighting Output Levels

Lighting levels shall not exceed the following maximum outputs specified as initial lumens per net acre of any development project (net acreage is the total land area of the parcel, less any area devoted to public rights-of-way):

Table 5.8 Maximum Lighting Output Levels

Use Type

Total Site Output

Partially Shielded

Single-family residential

Lamps cannot emit a Correlated Color Temperature in excess of 4,000 Kelvin

N/A

All other uses

70,000 initial lumens per net acre

3,850 initial lumens per net acre (counts toward total site output)

(5) Lighting Controls

a. Motion Sensors

1. Motion sensors may be used where the sensor is triggered by activity within the property lines and not triggered by activity outside the property lines.

2. Motion sensing fixtures shall be fully shielded and properly adjusted, according to the manufacturer’s instructions, to turn off in a reasonable timeframe after the detected motion ceases.

b. Lighting Time Limitations

1. Except for flagpole lighting and landscape lighting, Class 1 and Class 3 lighting shall be extinguished during nonbusiness hours. Lodging and other 24-hour businesses are encouraged to reduce lighting during off-peak hours overnight.

2. Landscape lighting shall be extinguished by close of business or 10:00 p.m., whichever is later.

3. Multi-class lighting shall conform to the time limitations of the strictest class. [Ord. 2020-04 § 1, 9-8-20 (Res. 2020-16)].