CS112 Thailand Launches Ambitious Street Lighting Project Case Study 20150330 ©2015 Lumileds Holding B.V. All rights reserved.

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Solution

Following an evaluation of competing solutions and a detailed

cost model analysis, the government of Thailand decided

to replace 400,000 streetlights on its highways and over

10,000 residential lamps on its side streets. LED streetlights

manufactured by Forth Corporation, a leading provider and

manufacturer of LED light fixtures in Thailand, were deemed

as ideal for this project.

Forth streetlights feature a robust overall design and a system

level efficacy of 100 lm/W. The ECO-TWO streetlights utilize

LUXEON T and TX emitters that are designed to achieve

high efficacy (143 lm/W at 350mA, 70CRI, 5000K) at a very

reasonable cost, delivering excellent color consistency,

luminance, and high flux.

In the residential areas, Forth ECO-ONE streetlights were used

to replace mercury vapor lamps that produced 4,000 to 6,000

lumens and consumed 100 to 125W, respectively. The ECO-

ONE lamp utilizes LUXEON Z ES emitters which deliver 142

lm/W at 70CRI and 5000K when driven at 350mA, which have

same footprint as LUXEON T and TX emitters, are compact

and flux density in an undomed solution for optical flexibility.

In outdoor applications the LEDs enable precise directionality

to maximize uniformity and limit gaps in luminance between

streetlights.

Benefits

Forth streetlights require near-zero maintenance and carry a

10-year warranty. On highways and in residential areas, the

LED streetlights provide reliable, improve illumination relative

to HPS streetlights.

Relative to HPS, the LED streetlights enable instant start and

flicker-free performance, uniformity of light and high color

rendering (CRI>70), lumen maintenance of 50,000 hours

(LM80), and no mercury disposal at end of life.

Results

Thailand has yet to install all 400,000 LED streetlights on its

residential areas and highways, but the results to date with

Forth ECO-ONE and ECO-TWO fixtures have been extremely

promising. Due to the very high efficacy of the LUXEON

LEDs and Forth streetlights, Thailand is able to realize a 70%

reduction in energy usage. That savings, combined with an

annual maintenance savings of 200 million Baht annually,

means the streetlight project will pay for itself rapidly.

“Lighting of the pedestrian areas is largely motivated by safety concerns. LED lighting

provides vibrant, consistent light in the designated areas.”

— Matinee Wandeepirom

Director, Forth Corporation Public Company