HomeMy WebLinkAbout06142018 ZPC Agenda Item 7 Section 8-107. -Outdoor lighting.
(a) Intent . The intent of this section is to require outdoor lighting to use "full cut-off" fixtures, low-output
bulbs, shields or other methods to reduce light trespass, glare and light pollution and to encourage
energy conservation.
(b) In general . Any lighting device installed outdoors (or on the exterior of a structure) must be
designed, constructed and operated so that the bulb or light source (diffused or not) is not visible
from within a door or window of an occupied building on another building site used for residential
purposes.
(c) Certain defenses . It is an affirmative defense to prosecution under this section that the device in
question is:
(1) a streetlight approved by the City;
(2) an official traffic light or signal;
(3) an emergency light used temporarily(not longer than the emergency conditions involved);
(4) a decorative holiday light used temporarily(not more than 45 days out of any 365-day period);
(5) a security light requested or consented to by the current owner of(or person in control of) the
building (on another building site)that is illuminated;
(6) a light located in a front yard or street side yard (or on a building facing such a yard), if: (i) all
the lights in—or facing—that yard emit, in the aggregate, no more than 4,000 lumens, and (ii) no
individual bulb in—or facing—that yard emits more than 1,000 lumens; or
(7) a device illuminating a sports field.
From: Clay Chew
To: Debbie Scarcella
Subject: Lumens
Date: Wednesday,June 13,2018 9:58:35 AM
Debbie,
4000 Lumens is approximately equal to:
4-75 watt Incandescent bulbs
4—53 watt Halogen bulbs
4—15 watt CFL
4—13 watt LED
Clay Chew
Chief Building Official
City of West University Place
3826 Amherst, West University Place,TX 77005
Tel 713.662.5830
Fax 713.662.5304
® ®! L
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A source radiating a power of one watt of light in the color for which the eye is most efficient(a wavelength of 555 nm, in
the green region of the optical spectrum) has luminous flux of 683 lumens. So a Iumen represents at least 1/683 watts of
visible light power,depending on the spectral distribution.
Lighting
Lamps used for lighting are commonly labelled with their light output in
lumens; in many jurisdictions this is required bylaw. " ^LED
A 23 W spiral compact fluorescent lamp emits about 1,400-1,600 Im.[31141
Many compact fluorescent lamps and other alternative light sources are � `
labelled as being equivalent to an incandescent bulb with a specific wattage.
Below is a table that shows typical luminous flux for common incandescent
bulbs and their equivalents.
In
Electrical power equivalents for differing lamps15116) A standard LED lamp capable of
Electrical power consumption (watts) producing 470 lumens. It consumes
Minimum light about one sixth the energy of an
output(lumens) Incandescent(non- Compact LED incandescent light bulb producing
halogen) fluorescent the same light.
200 25 3-5 3(71
450 40 9-11 5-8
800 60 13-15 8-12
1,100 75 18-20 10-16
1,600 100 24-28 14-17
2,400 150 30-52 24-
30181
3,100 200 49-75 32191
4,000 300 75-100 40.51101
On September 1, 2010, European Union legislation came into force mandating that lighting equipment must be labelled
primarily in terms of luminous flux(Im), instead of electric power(W).1111 This change is a result of the EU's Eco-design
Directive for Energy-using Products (EuP).11�1 For example, according to the European Union standard, an energy-
efficient bulb that claims to be the equivalent of a 60 W tungsten bulb must have a minimum light output of 700-750
1m.1131
Projector output
ANSI lumens
The light output of projectors(including video projectors) is typically measured in lumens. A standardized procedure for
testing projectors has been established by the American National Standards Institute, which involves averaging together
several measurements taken at different positions.1141 For marketing purposes, the luminous flux of projectors that have
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ALL ELECTRICAi WORK TO MEET 2011 NATIONAL ELECTRIC CODE
(NEC 2011)210.12 ARC-FAULT CIRCUIT INTERRUPTER(AFCI)PROTECTION OF OUTLETS IN DWELLINGS
THE REQUIREMENT FOR AFCI PROTECTION OF 1250.15A.OR 20A BRANCH CIRCUITS SERVING OUTLETS
AND DEVICES IN DWELLINGS INCLUDING KITCHEN AND LAUNDRY AREAS. AFC.PROTECTION IS REQUIRED IN
THE FOLLOMING AREAS.
BEDROOMS,DINING ROOMS,KITCHENS,LIBRARIES,RECREATION ROOMS.CLOSETS,FAMILY ROOMS,LIVING ROOMS
A 1 c:: SUNROOMS,DENS,HALLWAYS,PARLORS,LAUNDRY AREAS.AND SIMILAR ROOMS AND AREAS.
AFCI PROTECTION IS REQUIRED ALSO FOR DEVICES LOCATED IN THESE AREAS.
.---,_z:j 1 3 0 2 WAUGH ORME#353 FIRST FLOOR ELECTRICAL SCALE 1/4 IN = 1 FOOT
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