Single-Family in ESL Exterior and Site Lighting Design Guidelines
Exterior lighting includes any lighting that is mounted outside of livable building areas such as in landscaping, parking areas, along walkways and paths, on the outside of building walls, under eaves and patio covers, under open shed covers and within 3 feet of the openings in buildings where the opening is not regularly closed (such as breezeways and entry courts.
- Zoning Interpretation Regarding Exterior Lighting in ESL (pdf/282kb/2pp)
To achieve low scale requirements exterior lighting can either be:
- low in physical height, i.e. mounted or placed generally below eye level (6 feet), or
- Low in lighting intensity that includes the total of all lamps supported by a fixture. i.e. the maximum capacity of a fixture utilizing one or multiple lamp(s) that are:
a. an incandescent lamp source(s) not exceeding a total of 60-watts and 825 initial lumens,
b. compact florescent lamp source(s) not exceeding a total of 13 watts and 825 initial lumens,
c. a halogen lamp source(s) not exceeding a total of 20 watts and 6500 initial candelas,
d. a LED lamp source(s) not exceeding a total of five (5) watts, or
e. a High Intensity Discharge lamp source(s) not exceeding a total of 825 initial lumens.
To insure minimum light pollution, reduce glare and minimize light trespass onto neighboring properties – Exterior lighting is to be directed downward, recessed or shielded so that:
- the opening for the light is directed down, not sideways;
- the lighting source is hidden from view from off the property by the fixture design or by building structures such as fascia on an eave, walls, pillars, etc.
- the lighting fixture includes a device or feature such as vanes, louvers, fins, etc. that directs the light downward; and
- the lighting fixture includes frosted lenses that are semi-opaque and eliminate the view of the lamp source.
To minimize light trespass
- Exterior lighting must shield the light bulb so it cannot be seen from residential development (properties zoned R or used as residential) or from public viewpoints.
- Translucent and colored glass are not viable options unless the opacity fully blurs or hides the shape and nature of the light source.
- Public viewpoints include public or private streets, public schools or parks, and any open space accessible to the public.
Generally NOT Acceptable:
The following exceptions apply: