Feasibility Study on LED Street Lighting with Smart Dimming Systems in Wooi Stream, Seoul

Abstract

The South Korean and Seoul metropolitan governments have been forced to radically change the current High Pressure Sodium (HPS) lamps to Light Emitting Diode (LED) lamps for street lighting in cities according to "LED Plan 2060." Thus, this study aims to evaluate the feasibility of LED-based street lighting by analyzing energy efficiency and life cycle cost. For this purpose, a comparison of the lighting energy consumption by dimming control in Wooi Stream as a test bed project was conducted and the life cycle cost of LED lamps for replacing HPS lamps for street lighting was analyzed. As a result, LED lamp replacement could reduce the energy consumption by 69% compared to HPS lamps, and the dimming control system by pedestrian movements could save 77% of lighting energy. However, the payback period of LED replacement is 11.5 years. This indicates that the high purchase price of LED lamps would decline by 80% within 4-5 years with assertive investment for commercializing LED lamps and rapid growth of the lighting market in Korea, if LED lamps in street lighting have an economic performance.

Light-Emitting Diode (LED) versus High-Pressure Sodium Vapour (HPSV) Efficiency: A Data Envelopment Analysis Approach with Undesirable Output

“…The initial investment cost is the installation cost [41], and this is one of the important aspects to consider in adopting LED lighting technology [42]. The fact that price of LED lighting is much higher compared to the conventional lighting, LED lighting systems would require a higher initial investment cost [43,44], which then could result in a low penetration rate of LED lighting.…”

Revision of Smart Street Lighting LED

“…The case of South Korea, was based on programming the intensity of the luminaries at certain hours of the night; before 10 pm the luminaries are at 100 % light intensity, between 10 pm until dawn the intensity is reduced by 50 %. The case of South Korea proved to be efficient in terms of savings for intelligent LED lighting systems [66].…”

Improving Control Efficiency of Dynamic Street Lighting by Utilizing the Dual Graph Grammar Concept

“…The main technological enablers are Internet of Things (IoT) and sensor nets resulting in broad availability of data [4,7,8]. The main drivers are safety, convenience and, last but not least, economic factors such as energy savings [9,10]. Often, combination of smart technologies with renewable energy sources offers added economic value [11].…”