Design Standard for Street Lighting

7/27/2019 Design Standard for Street Lighting

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STREET LIGHTING


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TABLE OF CONTENTS

1. Scope.........................................................................................................1

2. Definitions................................................................................................1

3. Lighting Co!"ns....................................................................................3

3.1. Typical forms of columns....................................................................................3

3.2. Locations of columns...........................................................................................3

3.3. Base of columns...................................................................................................4

3.4. Projection and tilt angle.......................................................................................5

3.5. Earthing and fuses................................................................................................5

3.. !onduits...............................................................................................................

#. $o!nting Height......................................................................................%

4.1. "eneral.................................................................................................................#

4.2. $ mounting height or less than........................................................................#

4.3. % $ mounting height............................................................................................#

4.4. 1& $ mounting height..........................................................................................%

4.5. 12 $ mounting height..........................................................................................%

4.. 1%$ mounting height or more than.....................................................................%

&. Lighting A''(nge"ent............................................................................)

5.1. 'traight roads.......................................................................................................(

5.2. 'ingle)le*el road junctions..................................................................................(

5.2.1. T junction...................................................................................................(

5.2.2. 'taggered junction....................................................................................1&

5.2.3. !ross roads...............................................................................................11

5.2.4. + junction.................................................................................................12

5.3. Bridges...............................................................................................................13

5.4. Pedestrian crossings...........................................................................................13

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5.5. Par, and garden areas........................................................................................15

5.5.1. Typical forms of columns.........................................................................15

5.5.2. $ounting height and -ase of columns.....................................................15

5.5.3. Lamps and lighting le*els........................................................................1

%. Sp(cing f'o" L!"en $etho*...............................................................1%

.1. $ounting height and spacing -y luminaires......................................................1#

.2. $aimum spacing -et/een poles......................................................................1%

+. Lighting So!'ces....................................................................................1)

#.1. Lamps.................................................................................................................1%

#.2. Lighting le*els...................................................................................................1(

#.3. Lighting control.................................................................................................2&

). $(inten(nce (n* Ope'(ting ti"es.......................................................2,

%.1. $aintenance.......................................................................................................2&

%.2. 0ours of operation.............................................................................................2&

-. Dist'i!tion Bo/....................................................................................21

(.1. Locations of distri-ution -oes..........................................................................21(.2. !ircuit -rea,ers..................................................................................................22

(.3. 'ie and installation of ca-les............................................................................23

1,. High $(st Lighting.............................................................................2#

1&.1. Location of 0igh mast lighting........................................................................24

1&.2. Lighting source................................................................................................25

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LIST OF TABLES

iv


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LIST OF FIG0RES

Fig!'e , Tpic( fo'"s of st'eet ighting.................................................3

Fig!'e , B(se of ighting co!"n.............................................................&

Fig!'e , Geo"et' in ee4(tion of st'eet ighting.................................+

Fig!'e , T 5!nction.................................................................................1,

Fig!'e , St(gge'e* 5!nction...................................................................11

Fig!'e , C'oss 'o(*s...............................................................................12

Fig!'e , 6 5!nctions................................................................................12

Fig!'e , Tpic( (o!t (t T 5!nction 7ith pe*est'i(n c'ossing.........13

Fig!'e , Tpic( (o!t (t c'oss'o(*s 7ith pe*est'i(n c'ossing.........13

Fig!'e , St(gge'e* (''(nge"ent (*5(cent (t pe*est'i(n c'ossing.....1#

Fig!'e , Opposite (''(nge"ent (*5(cent (t pe*est'i(n c'ossing.......1#

Fig!'e , Tpic( fo'"s of p('8 o' g('*en ighting..............................1&

Fig!'e , Ro(*7( !"in(i'e c(ssific(tions.........................................1+

Fig!'e , Tpic( fo'"s of *ist'i!tion o/..........................................22

Fig!'e , Inte'n( *i(g'(" of *ist'i!tion o/.....................................2#

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LIST OF A99ENDI:

A eferences

24

B Eample of calculating design spacing

25

C tiliation factor of lamps

2

D !alculation of concrete -ase load

2%

E !ommunication net/or, for controlling street lighting

32

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1. Scope

This standard specifies the general reuirements for lighting columns6 mounting height6

arrangement6 spacing6 lighting sources and distri-ution -o of street lighting. 7t also co*ers

the type of ca-le and feeder lengths recommended for the street lighting distri-ution.

2. Definitions

A''(nge"ent

The pattern according to /hich luminaires are sited in plan for instance staggered6opposite6 single side and t/in central.

A4e'(ge i!"in(nce


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The ratio of minimum illuminance to a*erage or maimum illuminance. The closer this

figure is to 16 the more e*en the illuminance.

L!"in(nce I;A

The physical uantity corresponding to the -rightness of a surface ote. ?or installation purposes6 the centre of a lamp or lamps may -e regarded as the

photometric centre of a luminaire.

Set (c8

The shortest distance from the for/ard face of a column to the edge of a carriage/ay.


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Tit (nge

The angle -y /hich the ais of the fiing spigot entry is tilted a-o*e the horiontal /hen

the luminaire is installed.

3. Lighting Co!"ns

3.1. Tpic( fo'"s of co!"ns

?igure 1 sho/s the eterior appearances of typical street lighting /ith one and t/o arms.

The one arm columns may -e installed for lighting side/al,s.


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5& &.%

%& 8-solute minimum 1.&

ecommended minimum 1.5

1&& 8-solute minimum 1.5

12& 8-solute minimum 1.5

3.3. B(se of co!"ns

Fhere the column -ase is set up for rag -olted mounting6 the mounting -ase shall

consist of a cast concrete -ase. The -ase shall pro*ide four $24 gal*anied -olts e*enly

set out on a 35& mm pitch circle for fiing and aligning the columns.7t is recommended

that the planting depth of the column in the ground shall -e as sho/n in ta-le 2.

C Ta-le & D !oncrete -ase

Type of pole $ounting height Base dimensions in mm


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ground le*el. The designer can *erify the suita-ility of these depths for the site conditions6

and can arrange for other depths in the ground /here necessary. The minimum depth of

underground ca-les (f) shall -e && mm. 7n addition6 the height a-o*e ground of any

portion of the anchor -olts


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affiing /ith a suita-le gal*anied nut and -olt6 /ith a crimped terminal fitting on the earth

ca-le.The rated current of a fuse shall -e at least t/ice the normal full load current of the

maimum num-er of lights to -e simultaneously s/itched. The ampere rating of the fuse

/hich is installed in each column shall -e not less than a 1& amp fuse to ensure protection

against electric shoc, and o*er current.

3.%. Con*!its

!onduits shall -e reuired in road/ay crossings and also -e installed in footpaths /here

access roads6 dri*e/ays and footpath crossings are 2.5 m and o*er in /idth. !onduits shall

-e not less than 4& mm internal diameter6 and laid as nearly perpendicular to the street as

practica-le. They shall -e eca*ated to a minimum depth of && mm from finished groundle*el and a 1&& mm -ed of clean sand shall -e spread along the -ase of the trench prior to

laying the ca-le and a PI! duct shall -e laid in the trench. $ar,er tape shall -e 15& mm

/ide colored yello/ and printed along its entire length in 1&& mm high -lac, lettering /ith

the legend J!aution K 'treet Lighting !a-le -elo/.

#. $o!nting Height


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#.1. Gene'(

A?igure & "eometry in ele*ation of street lighting

Fhen a mounting height is generally higher6 a glare is decreasing and o*erall uality of

surrounding circumstances is impro*ing6 -ut a capital cost is higher and o*erall efficiency

is lo/er. The same mounting height shall -e ,ept not only in the same /idth of road/ays6

-ut also at road junctions. 8s far as possi-le6 mounting heights shall -e ,ept at or -elo/ the

height of adjacent -uildings. This is particularly important in conser*ation areas.

Therefore6 -efore a mounting height is determined6 luminance distri-ution6 o*erall

lighting effect and economic efficacy shall -e considered and compared.

#.2. 6 M"o!nting height o' ess th(n

6 Mor less than shall -e installed at some locations as follo/s 9

M the majority of side streets or alleys6 or

M lighting for pu-lic gardens and par,ing lots to ma,e people feel safe.

#.3. 8 M"o!nting height

8 Mshall -e installed at some locations as follo/s 9

Tilt angle

@*erhang

Fidth of carriage/ay

'et)-ac,

Edge ofcarriage/ay


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M ur-an traffic route /here6 o/ing to the multiplicity of road junctions6 no reduction in

the num-er of lighting points is to -e gained -y the use of a higher mounting

height6 or

M traffic routes /here higher mounting heights /ould -e out of scale /ith the adjacent

-uildings6 or

M relati*ely narro/ roads such as local distri-utor and access roads to residential areas

in /hich a mounting height -et/een 1& $ or 12 $ and 5 $ or $ is desira-le.

#.#. 10 M"o!nting height

10 Mshall -e installed at some locations as follo/s 9

M the majority of ur-an traffic routes6 orM lighting for traffic routes in /hich a mounting height of 12 $ /ould -e an

undesira-le appearance6 or

M lighting for /ide hea*ily used routes /here a large num-er of intersection6 -ends6

etc6 could lead to a short spacing ma,ing the use of 12 $ mounting height

uneconomical.

#.&. 12 M"o!nting height

12 Mshall -e installed at the location of /ide or hea*ily used routes /here ad*antage

can -e ta,en of a longer spacing of luminaires.

#.%. 18M"o!nting height o' "o'e th(n

0igh mast lighting poles shall -e installed at large)scale area such as airports6 doc,yards6

large industrial areas6 sports areas and road intersections.

&. Lighting A''(nge"ent

Poles for t/o and three lane roads shall -e installed in the /ay of staggered or single

side arrangement for reasons of economy. ?or more than four lane roads6 poles shall -e

installed in the /ay of opposite or t/in central arrangement or -oth.

C Ta-le & D $ethods of pole arrangement

>um-ers of lane 2 N 3 lanes @*er 4 lanes

8rrangement 'taggered or single side @pposite or t/in central


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&.1. St'(ight 'o(*s

M 'taggered arrangement

M 'ingle side arrangement

M @pposite arrangement

M T/in central arrangement on dual road/ays

&.2. Singe?e4e 'o(* 5!nctions

The lighting at a junction shall -e related to the need of dri*ers approaching the junction

to see *ehicles approaching from other directions. The illuminance6 on the carriage/ay6

throughout a junction shall -e not less than the illuminance pro*ided on the main roads

leading to the junction.

5.2.1. T junction

To achie*e the reuired luminance on the T junction6 typical lighting positions shall -e

as sho/n in figure 4.

'pacing

Oer-

'pacing

Oer-

Oer-

'pacing

Oer-

'pacing


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A?igure & T junction

Luminaire 8 on the major road shall -e sited in line /ith centre line of the approachlanes of the minor road to re*eal the end of the minor road to traffic approaching along it

and to re*eal pedestrians crossing its mouth.

Luminaire B on the major road shall -e sited at a distance from the ,er- of the minor

road approimately eual to one)third of the design spacing for the major road and

prefera-ly not greater than 12m along the major road. This luminaire re*eals -oth the

junction /ith the minor road to traffic in the major


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A?igure & 'taggered junction

5.2.3. !ross roads

Typical light positions for a cross roads are sho/n in figure . @n each road6 there shall

-e a luminaire 8 on the nearside for traffic lea*ing the junction at a distance from the ,er-

of the cross roads approimately eual to one)third of the design spacing for the majorroad. These four luminaires shall -e of the same type and mounted at the same height. This

distance may ha*e to -e reduced if the cross roads are /ide or if there is a pedestrian

crossing. Luminaire 8 ser*e to re*eal crossing and turning traffic. The net luminaire B6 on

each road6 on the offside for traffic lea*ing the junction6 shall -e at not more than t/o)

thirds of the design spacing for the major road6 from luminaire 8.

8pproimately 1;2 '

81

B1

1;3 '


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A?igure & !ross roads

5.2.4. + junction

?or a + junction6 the general arrangement of the luminaire in the major road shall -e

continued across the junction6 -ut /ith the spacing shortened to site the luminaire /here

they are needed and to increase the amount of light in the *icinity of the junction.

ot greaterthan '


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road.

Luminaire 8 shall -e conspicuous and shall emit adeuate light to re*eal road layout and

traffic mo*ement along the minor road. Luminaire B6 ! and shall pro*ide no less light

than those on any of the approach roads their positions are more critical than that of

luminaire 8.

&.3. B'i*ges

Fhen street lighting is installed at -ridges6 staggered arrangements can produce an

irregular appearance /hen seen o-liuely. The appearance of opposite arrangements is

preferred particularly as this may ma,e possi-le a lo/er mounting height. 8 central

arrangement appears as a regularly spaced array of columns from any *ie/point and needsfe/er columns than an opposite arrangement. 8ll luminaires shall -e at the same mounting

height at -ridges. 8nd rag -olt mounted columns shall -e used.

&.#. 9e*est'i(n c'ossings

A?igure & Typical layout at T junction /ith pedestrian crossing

A?igure & Typical layout at crossroads /ith pedestrian crossing

8t crossings in the immediate *icinity of junction6 the arrangement shall -e on the

principles sho/n in figures % and (6 although indi*idual junction dimension /ill *ary

Pedestrian crossing

Pedestrian crossing


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/idely.

Lighting is most effecti*e in re*ealing pedestrians using the crossing /hen it is

symmetrical from -oth directions along the road. The lighting6 therefore6 shall -e so

arranged that the crossing is at the mid)point of a span. This may in*ol*e the use of one

span of shorter spacing than that calculated. Particularly6 a column shall not -e placed

adjacent to a pedestrian crossing.

7n a staggered arrangement6 the optimum is to pro*ide t/o columns at eual distances of

not more than 1&m from the centre of the crossing. The column on the left)hand side of the

road shall -e -eyond the crossing as seen -y an approaching dri*er


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&.&. 9('8 (n* g('*en ('e(s

5.5.1. Typical forms of columns

The follo/ing figures are some of typical forms of columns installed in par, and garden

areas.


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H

B

A

1 0 0 m m 1 0 0 m m

5.5.3. Lamps and lighting le*elsFhen lighting poles in par, or garden places are installed6 installing metal halide lamps

are -etter than using high pressure sodium lamps -ecause of their high color rendering

inde


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light losses as uoted -y the manufacturer.

N is the total num-er of lamps

M is the maintenance factor /hich is the product of the lamp flu maintenance factor

and the luminaire maintenance factor. Ialues for the latter are gi*en in ta-le %.

E is the maintained a*erage illuminance on street


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ote 9 F : /idth of road/ay


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a-out %& lm;F /ith ecellent color rendering gi*ing /hite light. Therefore6 the preferred

sources6 on grounds of efficacy and life6 are high pressure sodium lamps and metal)halide

lamps. ?or main roads or some important places6 metal)halide lamps can -e prefera-le6 and

for other cases6 mercury *apour and high pressure sodium lamps can -e used. Po/er factor

shall -e corrected to a *alue greater than &.(.

C Ta-le & D !haracteristics of lamps

Type of lamp !apacity


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+.3. Lighting cont'o

There are three types of lighting control methods such as6 timer control6 photocell

control and /ireless remote control. $ost of main streets shall -e controlled -y the

/ireless remote control system /hich consists of a central controller and a recei*er

installed at a distri-ution -o6 if necessary a pole recei*er. 7n case of controlling the range

of streetlights6 for instances -y each -ranch circuit or column6 the /ay of controlling each

-ranch circuit must -e more economical6 suita-le than controlling each column. 7n rural

areas6 a timer control or photocell control shall -e applied as a control /ay of street

lighting.

). $(inten(nce (n* Ope'(ting ti"es

).1. $(inten(nce

7t is essential that cleaning and lamp replacement routines shall -e regularly carried out

to maintain suita-le conditions. $aintenance program shall include lamp replacement6

luminaire cleaning6 rene/al of failed parts6 chec,ing of gas,ets and night inspections.

The *alues of the luminaire maintenance factor gi*en in ta-le ( are typical and ta,e into

account the en*ironmental pollution and the freuency of cleaning. The reduction in lamp

output /ith age is allo/ed for -y multiplying the initial luminous flu of the lamp -y the

appropriate lamp flu maintenance factor.

C Ta-le & D $aintenance factors

!leaning inter*als

ote 9

1= 0igh pollution occurs in the centre of large ur-an areas and in hea*y industrial areas.

2= $edium pollution occurs in semi)ur-an6 residential and light industrial areas.

3= Lo/ pollution occurs in rural areas.

).2. Ho!'s of ope'(tion

'treet lighting is reuired during all the hours of dar,ness6 independently of traffic flo/6

and shall normally -e in full operation from a-out 1& min after sunset to a-out 2& min


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prior to sunrise in any controlling /ay. The practice of etinguishing certain luminaire

/hen the traffic flo/ is small does not fulfill the lighting needs of *ehicular traffic and

may increase the li,elihood of collision /ith columns.

C Ta-le & D @perating times

!ategory '/itch on '/itch off

Time 1& min after sunset 2& min prior to sunrise

-. Dist'i!tion Bo/

-.1. Loc(tions of *ist'i!tion o/esistri-ution -oes shall -e of sheet steel construction6 gal*anied after fa-rication6 of

/eatherproof construction and shall -e large enough to afford easy access to the control

euipment. 8ll fiings6 hinges and loc,s shall -e of non)ferrous metal. They shall -e

pro*ided /ith a concrete foundation6 -e free standing /ith necessary ducts for incoming

and outgoing ca-les and istri-ution -oes shall not -e sited in indentations in landscaping

features /here /ater is li,ely to collect6 or in position *ulnera-le to impact from *ehicles

and shall normally -e positioned a minimum of %&& mm from the edge of carriage/ays.

"round electrodes shall -e installed at e*ery distri-ution -o.

c

-

a

c

-

a

ecei*er

Fatt)hour

meter

'teel pole

ecei*er

!oncrete

Fatt)hour

meter


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drops.

-.3. Si@e (n* inst((tion of c(es

The incoming ca-le for the main -rea,er of distri-ution -oes shall -e a minimum sie

of 3.5! G35 mm2RLPE insulated PI! sheathed copper ca-le or eui*alent to meet the

load and the outgoing ca-le for a group of streetlights shall -e a minimum sie of 2! G1

mm2RLPE insulated PI! sheathed copper ca-le or eui*alent.

The ca-le for internal /iring of columns shall -e a minimum sie of 2! G 2.5 mm 2PI!

insulated copper ca-le. 'treet lighting loads shall -e -alanced o*er the three phases.

Therefore6 lighting designers shall indicate on the street lighting plan the phase to /hich

each luminaire is to -e connected.C Ta-le & D $inimum sie of ca-les

!ategory 7ncoming ca-le @utgoing ca-le 7nternal /iring

!a-le sie 35 mm2 1 mm2 2.5 mm2

8ll underground supplying ca-les shall -e laid directly6 ecept they run -eneath road/ay

or path/ay crossings. 7n that case6 ca-les shall -e laid in duct and ducts shall -e installed

as nearly perpendicular to the street as practical and terminate one meter -ehind the ,er-


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A?igure & 7nternal diagram of distri-ution -o

1,. High $(st Lighting

1,.1. Loc(tion of High "(st ighting

0igh mast lighting consists of se*eral luminaires mounted on a single luminaire support.

This type of system shall -e installed at the locations that need large)area illumination6

such as par,ing lots6 interchanges and air)ports in order to pro*ide the greatest degree of

roadside safety and night *isions. sually there are t/o ,inds of poles6 such as stationary

and automatically ele*ated 0$L. 7t is recommended that the automatically ele*ated 0$L

-e installed due to the easy maintenance of replacing -ro,en lamps. The height of 0$L

shall -e 1% m6 2& m and 25 m6 -ut its height can -e changed due to the conditions of

installation areas. 0$L shall not -e placed in narro/ medians if possi-le. 0$L placed

/ithin the clear one shall need protection such as guardrail. The height a-o*e ground of

any portion of the anchor -olts or foundation shall not eceed 1&& mm in order to pre*ent

the -ottom of a *ehicle from snagging the foundation or -ase.

8fter re*ie/ing the num-er of luminaires per mast and potential mast locations6

R S T N

$!!B 4P

$! 4

1P 3& 8


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designers shall contact manufactures of high mast lighting to see their assistance in

determining eact luminaires selection and final mast location.

8 grounding electrode shall -e installed at each high)mast lighting poles. Each high mast

lighting pole has a minimum of anchor -olts in a concrete -ase.

1,.2. Lighting so!'ce

0igh pressure sodium lamps shall -e typically6 -ecause 0P' lamps pro*ide ecellent

luminous efficacy6 good lumen)maintenance6 long life6 and *ery accepta-le color. 7f the

designers /ant to -etter night *isions6 metal halide lamps shall -e considered to -e used.

1&&& Fatts are suita-le for the capacity of lamps. The tilt angle shall -e ,ept from 15S to

3&S to pre*ent glare.C Ta-le & D !haracteristics of lamps for high mast lighting

Types of lamp !apacity


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Appen*i/ A Refe'ences

B' 54%( oad lighting

Part 1 "uide to the general principles

Part 2 !ode of practice for lighting for traffic routes

Part 4 !ode of practice for lighting for single)le*el road junctions

including rounda-outs

Part !ode of practice for lighting for -rides and ele*ated roads

Part ( !ode of practice for lighting for ur-an centres and pu-lic amenity areas

B' #54 'ingle)phase street lighting fuses' &11( 'pecification for street lighting design and installation

O' ! %&1& Luminaires for road lighting

O' ! %321 $olded case circuit -rea,ers

7E! &5(% Luminaies

Part 1 "eneral reuirements and tests

Part 2)3 Particular reuirements luminaires for road and street lighting


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Appen*i/ B E/("pe of c(c!(ting *esign sp(cing

There is four dri*ing lane in ur-an area. !onditions needing to decide design spacing-et/een poles are as follo/s.

1= The /idth of each lane 9 3 m.

2= !haracteristics of lamps installed 9 4&& F 0igh pressure sodium lamp


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Appen*i/ C 0tii@(tion f(cto' of ("ps


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0 . 5 0

0 . 4 5

0 . 4 0

0 . 3 5

0 . 3 0

0 . 2 5

0 . 2 0

0 . 1 5

0 . 1 0

0 . 0 5

1 . 0 2 . 0 3 . 0

1 . 02 . 03 . 0

0 . 3 0

0 . 2 5

0 . 2 0

0 . 1 5

0 . 1 0

0 . 0 5

A?igure1 Eample of curse sign of utiliation

>ote. Fhen it comes to actual design6 it needs to refer to the utiliation factor of rele*ant

lamps.

!ut off

'emi cutoff

H

W1

H

W2

!ut off

'emi cutoff

01

02


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Appen*i/ D C(c!(tion of conc'ete (se o(*

1. Con*itions of *esign

1.1 Find load

!ategory !ircular @ctagonal Tetragonal Luminaire

Find load


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3.3 Luminaire


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+. St'ength

#.1 0oriontal moment

0oriontal load


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E 9 areas of /ea, field

! 9 ground /hich has lo/ resistance /ith high le*el of underground /ater

E 9 areas of normal paddy field

9 ground /hich has no resistance /ith *ery high le*el of underground /ater

-. 9e'"issie p'ess!'e e('ing po7e' of conc'ete (se

MMR 1 and

A

Wqa

Fhere6

$19 resistance moment for flan, of main plate

=2(.1


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Appen*i/ E Co""!nic(tion net7o'8 fo' cont'oing st'eet ighting

1= Types of /ireless remote control systems

a= !ontrol of each distri-ution -o -y -ranch circuit

@ne)/ay control

) "i*ing only an on;off signal to the recei*er of each distri-ution -o /hich is connected

/ith some street lighting in order to turn on;off street lamps -y -ranch circuit line.

T/o)/ay control

) "i*ing not only an on;off signal to the recei*er of each distri-ution -o6 -ut also

recei*ing the indi*idual information of distri-ution -oes -y -ranch circuit line /hich isgrouped /ith a-out 1&N15 street lightings to chec, the present condition of indi*idual

distri-ution -oes.

-= !ontrol of each street lighting


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St'eet Lighting

T/o)/ay 9 8 control center can not only turn on and off group lightings just li,e the

one)/ay control6 -ut also recei*e and chec, the collecti*e information of group lightings.

-= !ontrol of each street lighting

By communicating /ith each lighting6 a control center can not only turn it on and off6

-ut also recei*e and chec, useful information from them such as their positions6 lea,age

current and year of installation.

3= $erits and demerits of each control system

!ategory !ontrol of istri-ution -oes !ontrol of street lightings

$erits Z Economical in*estment

Z !ontrol some lamps connected

-y -ranch circuit

Z Possi-le to chec, and control

each street lighting

Z Easy to find out faulty points

emerits Z 7mpossi-le to control each street

lighting

Z 0uge initial in*estment

Z $ore than 1& times epensi*e

!omponents Z !entral controller

Z istri-ution -o controller

Z !entral controller

Z istri-ution -o controller

Z Lamp post controller

Cont'o Cente'

ata-ase

eport

Se'4e'istri-ution Bo

Lighting

"ate/ay

$odem

Design Standard for Street Lighting

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