In residence districts, or commercial districts where exterior
lighting equipment casts significant light onto residential properties,
any permitted illumination of buildings, structures, tennis courts,
pools, signs, or other open areas shall be subject to the following
regulations:
A. Outdoor lighting shall be selected, located and focused so that only
the building, structure, sign, or other open area on the lot is illuminated.
Signs, if lighted, shall be externally illuminated only from directly
above the face of the sign. The internal lighting limitation shall
not apply to approved commercial signs in a commercial zoning district
where signs are permitted to be internally illuminated.
B. Outdoor lighting shall be aimed and/or shielded so that the light
shall not be directed onto any adjacent lot, public street or public
right-of-way. If any exterior luminaire (light fixture) exceeds the
following lamp wattage limits, then the source of illumination shall
be fully shielded in order to prevent glare and off-site migration
of light onto adjacent properties. The following limits shall apply
to the total lamp wattage per luminaire.
(2) Halogen (quartz or tungsten halogen): 75 watts.
(3) Halogen infrared reflecting (infrared-conserving): 60 watts.
(4) High-pressure sodium (HPS): 50 watts.
(5) Pulse start metal halide (PSMH) or ceramic metal halide (CMH): 40
watts.
(6) Compact fluorescent (CFL): 26 watts.
(7) Straight (linear) fluorescent: 32 watts.
(8) Low voltage (12 to 24 volts) landscape lighting utilizing either
an incandescent or halogen lamp: 25 watts.
C. Outdoor lighting shall not result in a measurable light level greater
than one-half of one (0.5) footcandle at the property line or lot
line, measured either vertically, horizontally, or line of sight at
an elevation of five feet above grade.
D. No decorative, sign or floodlighting, except low-intensity (low-brightness)
safety or security lighting, which exceeds the lamp wattages as listed
above shall be permitted to operate after 11:00 p.m. and until dawn.
Lighting controlled by an automatic motion sensor, with daylight detection
plus automatic turnoff and adjusted for a maximum "on" duration of
not more than 10 minutes, shall be exempt from the 11:00 p.m. time
limit.