Development of streets lighting in Kaunas City

A. Vaškys, R. Balsys, A. Mikulionis, V. Pakėnas,

Kaunas University of TechnologyDepartment of Electrical and Lighting Engineering

KTU

Brocken luminaires of stairs lightingKTU

Crimes dependents on illuminance

0

20

40

60

80

100

120

0 5 10 15 20 25

Illuminance , lx

Cri

me

s,%

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It was more for trees lightingKTU

Traffic accidents depends on road luminance

0

20

40

60

80

100

120

0 1 2 3Road luminance, cd/m2

Tra

ffic

ac

cid

en

ts,

%

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• Number of traffic accidents in Kaunas during which people have suffered

2 4 6 8 10 12 14 16 18 20 22 240

40

80

120

160

200

Num

be

r of a

cc

ide

nts

Ho urs

1996

1997

1998

1995

KTUKTU

Expenditure for street lighting7

24

69

Installation

Maintenance

Energy

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Electric energy saving:

• Installing efficient lamps,

• Usage of light dimming systems,

• Using efficient luminaires.

KTU

Incandescent Lamp

Light output 15-20 lm/W

Service time about 1000 h

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Mercury Lamps

Light output 20-60 lm/W

Service time about 15 000 h

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• Metal Halide Lamps

Light output 60 -90 lm/W

•Service time about 10 000 h

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• Sodium Lamps

Light output 80 – 130 lm/W

Service time about 24 000 h

KTU

KTU

Lamps used in Kaunas streets

0

5000

10000

15000

20000

25000

1994 2001 2004Yaer

Lam

ps

qu

anti

ty

Incandescent

Mercury

Sodium

THE RESULTS OF FIRST STREET LIGHTING RENOVATION 

 No.

 Description

 Units

Results

Beforerenovation

After renovation

 1.

 Number of luminaires

 

p.c.s 

16000 

16000

 2.

 Installed power of lamps

 

kW 

4880 

1920

 3.

 Electric energy consumption

 

kWh 10 075 783

 3 970 924

 4.

 Electric energy saving

 

kWh

   

6 104 859

60

KTU

Lamp's power average 1994-2004

258 267 270 266283

130

198

266280

233

125 124

153137

200

0

50

100

150

200

250

300

Vilnius Kaunas Klaipėda Šiauliai Marijampolė

Po

wer

, W

.

1994

2001

2004

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Lemps power installed

0

2000

4000

6000

8000

Po

wer

, kW

.

199420012004

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Energy cosumption for 1 citizen

0

10

20

30

40

50

Ele

ctri

c en

ergy

, kW

h

1994 27.9 28.1 31.4 42.9 28.7

2001 24 30 40 44 13

2004 26.7 29.8 35.5 46.7 26.9

Vilnius Kaunas Klaipėda Šiauliai Marijampolė

Lamps operating time average per year

0

500

1000

1500

2000

2500

3000

3500

4000

4500

Ho

urs

1994 2093 2028 2499 2246 1728

2001 3388 2695 2995 1992 1192

2004 3434 3808 3885 4063 2026

Vilnius Kaunas Klaipėda Šiauliai Marijampolė

KTU

Lighting regulation diagram

Hours

M onth

Power %

100

75

100

75

50

O F F

O N

1 2 3 4 5 6 7 8 9 10 11 12

KTU

Prospects of Kaunas City lightingKTU

Lighting installations Number

Installed power, kW

Investment (LTL thousand)

Light dimming and control

289 3261 4 700

Parks and squares 16 170 1 800

Architectural units 36 201 3 700

Conflict zones 200 50 1 500

Yards and pedestrian ways

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THANK YOU

A. Vaškys, R. Balsys, B. A. Mikulionis, V. Pakėnas,

KTU Department of Electrical and Lighting Engineering

KTU