STATE UNIVERSITY CONSTRUCTION FUND

P R O G R A M D I R E C T I V E S

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Outdoor LightingDirective 16-6

STATE UNIVERSITY CONSTRUCTION FUND

P R O G R A M D I R E C T I V E S

DIRECTIVE 16-6Issue date: January 2003

OUTDOOR LIGHTING

1.General

This Directive has been developed to serve as a guide for the engineering of site lighting installations on Fund projects. Design guidelines for architectural and aesthetic aspects are covered by design vocabularies and Campus standards.

2.Policy

Design outdoor lighting to provide for the safety, security and comfort of those persons who will be using campus roads, streets, walks, and parking areas. Emphasis in the engineering design shall be to produce maximum useful light with minimum energy consumption and fixture quantities and to provide maximum reliability with minimum maintenance.

3.Roadway and Street Classifications

a.Roadway Design Conditions

(1)Heavy: Area with heavy vehicular, pedestrian activity, varied vehicular, pedestrian activity, frequent intersections and crosswalks and a high incidence of off-road driver distractions approaching or comparable to a downtown city area.

(2)Intermediate: Area with steady vehicular, pedestrian traffic, primarily passing rapidly through, occasional intersections and crosswalks and infrequent off-road driver distractions approaching or comparable to a combination residential commercial city area.

(3)Light: Area with light vehicular, pedestrian traffic, rapidly passing through, very few or no intersections and crosswalks or off-road driver distractions.

b.Selection of Illumination Levels: Light levels given are for average horizontal footcandles. Minimum levels between standards shall not be less than one third of the average values given, and maximum values shall not exceed four (4) times the average values.

(1)Heavy: For conditions approaching those described in this classification, provide not less than two (2) footcandles.

(2)Intermediate: For conditions approaching those described in this classification, provide not less than 1.5 footcandles

(3)Light: For conditions approaching those described in this classification, provide not less than one (1) footcandle.

(4)Intersections & Crosswalks: Design for the sum of the design values of the Intersecting streets or twice the main street value.

c.Parking Lot Specifications

(1)Design Conditions

(a)Small Short Time: Parking areas of up to 100 cars where there is frequent turnover used by people unfamiliar with the surroundings.

(b)Large Short Time: Parking areas of over 100 cars where there is a frequent turnover used by people unfamiliar with the surroundings.

(c)Small All Day or Night: Parking areas of up to 100 cars left for long periods usually used by people familiar with the surroundings.

(d)Large All Day or Night: Parking areas of over 100 cars left for long periods usually by people familiar with the surroundings.

(2)Selection of Illumination Level: Light levels given are for average horizontal footcandles. Minimum levels between standards not less than one third average values given, and maximum values shall not exceed four (4) times the average values.

(a)Small Short Time: Provide not less than two (2) footcandles.

(b)Large Short Time: Provide not less than three(3) footcandles.

(c)Small All Day or All Night: Provide not less than two (2) footcandles.

(d)Large All Day or All Night: Provide not less than two (2) footcandles.

d.Control: Depending upon the amount of power involved and the anticipated use of the parking lot, some additional control and/or wiring may be justified. An economic evaluation should be made to determine if all fixtures should be kept on all night. Some security lighting should be provided for parking lots which will be abandoned at night.

e.Walks

(1)Walkway Design Conditions: Walkway lighting design depends more on local conditions than other factors for adequacy. Higher levels are provided:

(a)To eliminate sudden contrast of going from light to dark.

(b)To create a sense of security in certain environments.

(c)To aid recognition of persons and surroundings, etc.

(2)For remote walks or any walk where people may feel insecure, off walk for silhouette lighting might be preferred. That is to give the walker the feeling that they can see as well as be seen.

(3)Selection of Illumination Levels: Light levels given are for average horizontal footcandles with minimum levels between standards not less than one-third average values given, and maximum values shall not exceed four (4) times the average values.

(a)Main Walks - installed for a specific purpose where traffic will be fairly heavy and/or hurried, should be clearly defined and reasonably well lit to approximately three (3) footcandle average. In areas of heavy congregation, building entrances, etc., increase the level to approximately five (5) footcandles average.

(b)Intermediate or Interconnecting Walks - two (2) footcandles.

(c)Casual Walks - two (2) footcandles.

4.Materials and Specifications

a.Selection of Equipment

(1)Equipment used shall be of a type available from three manufacturers with replacement parts normally stocked and readily available.

(2)Luminaires shall be standard street lighting type with I.E.S. distribution characteristics for the application in accordance with the 1953 method of classification. Control shapes or sizes by addition of shrouds. Provide sharp cutoff fixtures where stray light is a problem.

(3)Lamps shall be Sodium Vapor or Metal Halide of the highest wattage practical to obtain economical spacing of fixtures and the specified distribution of light. Provide brightness control with lenses and/or shielding.

(4)Ballasts shall be suitable for outdoor application and properly protected from the elements in the installation. Ballast installations may be within the luminaire, pole or a transformer base pole. Installation of ballasts below grade are not acceptable. Specify regulator type ballasts with power factor not less than 95%, which will provide lamp starting at -20°F.

(5)Poles shall be selected for strength, durability and require minimum maintenance. Standard aluminum or concrete street lighting poles with space provided for ballasts, fuses and splices are recommended.

b.Installation Details: Install wiring in direct burial non-metallic conduits or prewired duct at a minimum depth of 24” below finished grade. Provide rigid metallic conduits for roadway crossings or in areas of high hazard where future planting or construction is anticipated. Splices in buried junction boxes will not be allowed. Loop cables from pole to pole and do all splicing within the pole base. Splices must be readily accessible within the splice chamber to simplify future trouble shooting.

(1)277Y/480 volt 3 phase 4 wire distribution systems are preferred.

(2)Provide a separate ground conductor throughout the system bonded to a suitable ground at the source. A ground rod is required at each pole base with a bonding connection between the ground rod, ground conductor, and the pole.

(3)Specify that fixtures be connected on alternate phases and protect the circuits with single pole circuit breakers at the source.

(4)Specify a durable method of cable phase identification such as color coding or tagging.

(5)Specify that fuses be provided to protect individual fixtures and ballasts.

(6)Specify a suitable waterproof splicing procedure and provide a detail and specification.

(7)All new underground circuitry shall include the installation of a metallic-lined, plastic underground marker tape. The tape shall be buried directly above the conduit and contain the printed name repeated continuously along its length.

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Outdoor LightingDirective 16-6