LED STREETLIGHTS

REVOLUTIONARY STRIDE IN CONTEXT OF POWER SAVING

CONTENTS

STREET LIGHT

WHAT IS A LED

SALIENT FEATURES

STATISTICS AND RECORDS

THE PLAN

THE INSPIRATION

THE SAVINGS

INSTALLED STREET LIGHTS IN INDIA

STREET LIGHT

IMPORTANT AND EXPENSIVE RESPONSIBILITY OF

CITY, (10%–38%) OF TOTAL ENERGY BILLS WORLD

WIDE (NYCGP 2009)

ENERGY EFFICIENT STREET LIGHTS CAN CUT DOWN

STREET LIGHT COST UPTO 60%

EFFICIENT STREET LIGHTING CAN ALSO REDUCE

GREEN HOUSE EMMISIONS

ENERGY-EFFICIENT STREET LIGHTING PROJECT CYCLE

COMPARING THE BEST AVAILABLE LAMP TECHNOLOGY

WHILE COMPARING THE DIFFERENT LAMP TECHNOLOGIES MENTIONED IN THE ABOVE TABLE, IT IS FOUND THAT LED LIGHT :

• HAS HIGHER ENERGY SAVINGS.

• HAS LOWER MAINTENANCE COST.

• HAS LONGER LIFE.

• IS MUCH MORE ECO-FRIENDLY.

WHAT IS A LED ?

STANDS FOR LIGHT-EMITTING DIODE

SIMPLY THE FUTURE OF LIGHTING

NOT GETTING INTO THE SCIENCE BEHIND LED WE

CAN SAY THAT IT IS THE “IDEAL GREEN LIGHT”

SALIENT FEATURES

VERY LOW POWER CONSUMPTION.

REDUCED MAINTENANCE COSTS DUE TO LONG LIFE(50000 Hrs

WITH 70% LUMENS MAINTAINED)

DO NOT CONTAIN TOXIC CHEMICALS (E.G., MERCURY)

NO PRODUCTION OF ULTRAVIOLET LIGHT (WHICH IS WHAT

ATTRACTS INSECTS)

NO GLARE EFFECT, REDUCING VISUAL FATIGUE FOR BOTH

DRIVERS AND PEDESTRIANS

SOLID STATE (NOT FRAGILE) DEVICE.

HIGH LUMINOUS EFFICIENCY

FRONTAL DIRECTIONALITY (BEST SUITED FOR

STREETLIGHTS)

INSTANT LIGHT (PROMOTES SECURITY).

HIGH COLOR INDEX, PROVIDING BRIGHT, TRUE

COLORS DURING NIGHTTIME HOURS.

ILLUSTRATION FOR DIRECTIONALITY

LED STREET LIGHT SODIUM STREET LIGHT

Comparison of lighting patterns from LED and Sodium Street light. The focused nature of the LED system places light on the roadway and also drastically reduces light pollution.

STATISTICS AND RECORDSPARAMETERS LED CFL INCANDESCE

NT

Life in Hours 50000 10000 1500

Lumens /Watt 100+ 54 11

Eco-friendly Yes No No

UV rays No Yes Yes

Infrared rays No Yes Yes

Generate thermal heat

No Yes Yes

JUSTIFICATIONLED LAMP NORMAL STREET LAMP

THE PLAN FUNDING FOR STREET LIGHTING IS INCREASINGLY DIFFICULT

AS ELECTRIC COSTS RISE AND THE AVAILABLE MUNICIPAL

FUNDS GET TIGHTER.

WHAT IF A TECHNOLOGY IS INCORPORATED THAT WOULD

CREATE SIGNIFICANT ENERGY AND MAINTENANCE SAVINGS.

LEDs REDUCE ENERGY CONSUMPTION TO ONE AND A HALF

TIMES AND LASTS 5 TIMES LONGER THAN CONVENTIONAL

LIGHTING.

THE PLAN IS TO REPLACE ALL THE EXISTING HPSV OR

MERCURY STREET LAMPS WITH LED LIGHTS IN THE STATE OF

UTTAR PRADESH AND EVENTUALLY IN WHOLE OF THE NATION.

THE INSPIRATION

LED PROJECTS IN INDIA

KOLKATA MUNICIPAL CORPORATION

WEST BENGAL STATE ELECTRICITY DISTRIBUTION

COMPANY LTD

HYDERABAD STREET LIGHTS

WEST BENGAL POLLUTION CONTROL BOARD

RESULTS: 400 HPSV STREET LIGHTS REPLACED BY

EQUIVALENT LEDS IN 9 STREETS IN KOLKATA

THE SAVINGS

CONVERTING TO LED STREETLIGHTS SAVES OVER

50% ON ENERGY CONSUMPTION AND NEARLY 80%

ON MAINTENANCE.

A LOAD RELIEF OF OVER 560 MEGAWATTS ON THE

GRID

THESE CALCULATIONS ARE BASED ON 1991 CENSUS

AND IT WILL AT LEAST BE TWICE THESE FIGURES

NOW

SAVING IN COMPARISION TO NORMAL STREET LIGHT :-

60 WATT SODIUM LAMP HAVE SAME LUMINOUS EFFICIENCY AS OF

25 WATT LED LAMP.

NEARLY 1.72 MW AND 1 TONNE OF CARBON EMMISION IS SAVED IN

WHOLE LIFE SPAN.

60 WATT SODIUM LAMP 25 WATT LED LAMP

145 KG CO2 60 KG CO2

AN OVERVIEW OF LED STREET LIGHT PROJECTS IN INDIA.

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