Dobbins JLUS IMP Public Draft Light Pollution Study | Page 228

1 . All existing exterior lighting located on a subject property that is part of an application for design review approval , a conditional use permit , subdivision approval , or a building permit is required to be brought into conformance with this Article before issuance of a Certificate of Occupancy , final inspection or final plat recordation , when applicable . For other permits , the applicant shall have a maximum of thirty ( 30 ) days from date of permit issuance to bring the lighting into conformance .
2 . All other existing exterior lighting on property used for residential , commercial , institutional , or any other public and semi-public uses that is not in conformance with this Article shall be brought into conformance with this Article within eighteen ( 18 ) months from the date of adoption of this Article , by October 15 , 2005 . e . Stray light striking the eye that may result in ( a ) nuisance or an ow ; ( b ) discomfort glare such as bright light causing squinting of cing the ability of the eyes to see into shadows or ( d ) reduction of
day lighting . Exterior lighting consisting of strings of individual l fifteen ( 15 ) lumens .
minance . The amount of light falling on any point of a surface mea ured as lumens per square foot , and lux are measured as lumens
NA . Illuminating Engineering Society of North America ( IES or I neers .
NA Recommended Practices . The current publications of the IESN
-3 : DEFINITIONS : Unless specifically defined below , words or phrases used in this Article shall be interpreted to give them the meaning they have in common usage and to give this Section its most reasonable application .
light . A luminaire equipped with a lamp that produces over one thousand eight hundred ( 1,800 ) lumens . Area s include , but are not limited to , streetlights , parking lot lights and yard lights . ( See Table 1 , for light output of us lamps ).
age horizontal footcandle . The average level of illuminance for a given situation ( with snow cover if that is to be cted in the given situation ) measured at ground level with the light meter placed parallel to the ground .
ding Official . The City of Sun Valley Building Official . p . The generic term for an artificial light source , to be distinguish monly referred to as “ bulb ”.
t . The form of radiant energy acting on the retina of the eye to ma
t pollution . Any adverse effect of artificial night light including , b nished vision due to glare , light trespass , or any manmade light th
t trespass . Light falling on the property of another or the public ri ting . Any or all parts of a luminaire that function to produce light ctional flood light . A fully shielded fixture that is angled no higher than 30 degrees from vertical and which targets cific area to be lit . ( See Figures 6 and 7 )
ty-five ( 85 ) degree cut-off type of luminaires . Luminaires that do not allow light to escape above an eighty-five degree angle measured from a vertical line from the center of the lamp extended to the ground ( see Figure 2 )
rior lighting . Temporary or permanent outdoor lighting that is installed , located or used in such a manner to cause rays to shine outdoors . Luminaires that are indoors that are intended to light something outside are considered ior lighting for the purpose of this Article .
dlight . A light fixture that produces up to one thousand eight hundred ( 1,800 ) lumens and is designed to flood a defined area with light . ( See Table 1 for light output of various lamps )
candle ( fc ). The American unit used to measure the total amount of light cast on a surface ( illuminance ). One andle is equivalent to the illuminance produced by a source of one candle at a distance of one foot . For example , ull moon produces . 01 fc ( fc are measured with a light meter ). One footcandle is approximately equal to ten ( 10 ) the metric unit also used to measure illuminance . ting Administrator . A City official designated by the Planning & enforce the Sun Valley Exterior Lighting Ordinance , and make re
en . The unit used to quantify the amount of light energy produced s is listed on the packaging . For example , a 60-watt incandescent ure sodium lamp produces 8000 lumens .
inaire . A complete lighting unit , consisting of a lamp or lamps to to position and protect the lamps and to connect the lamps to the ocells . Commonly referred to as “ fixture ”.
ntained illuminance . The condition that occurs after 200 hours ning is necessary . Measurements are taken at ground level w minance and measured at 5 feet above ground with sensor perpend
essential lighting . Lighting that is not necessary for an intended p nclude any lighting used for safety and / or public circulation purp cut-off luminaires . A luminaire designed and installed where no light is emitted at or above a horizontal plane ing through the lowest point on the luminaire . ( See Figure 1 )
y shielded . The luminaire incorporates a solid barrier ( the shield ), which permits no light to escape through the er on the top and sides of the fixture . ( See Figure 4 ) que . The effect of a part or parts of a luminaire that provide ( s ) a b does not allow any light to pass through .
ally shielded . The luminaire incorporates a translucent barrier , th e light to pass through the barrier of the fixture ’ s walls while conc
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