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

Rofaie, Nina Sakinah Ahmad; Phoong, Seuk Wai; Mutalib, Muzalwana Abdul Talib Abdul

doi:10.3390/en15134589

Energies

2022

DOI: 10.3390/en15134589

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

Nina Sakinah Ahmad Rofaie

Seuk Wai Phoong

Muzalwana Abdul Talib Abdul Mutalib

Abstract: Road lighting is essential to ensure the safety and comfort of its users, especially in preventing accidents and aiding visual tasks. The monumental shift from conventional road lighting technology to light-emitting diode (LED) lighting is driven by energy efficiency, associated cost savings, and environmental concerns in the road lighting system. This study aims to investigate the performance of LED in substitution for high-pressure sodium vapour (HPSV) road lighting in Penang Bridge, Malaysia using the Data … Show more

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Cited by 3 publications

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Investigation of photometric distribution of LED and HSPV for road lighting

Jamaludin,

Wan Ismail,

Husini

et al. 2023

J. Eng. Appl. Sci.

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Lower energy consumption while preserving the required light brightness is one of the main purposes of changing from an HPSV lighting system to a LED lighting system for road lighting. The current practice of changing whole luminaires requires a huge capital cost. Although LED lamps have a high illumination rate, the lamp structure which is different from existing HPSV lamps may improve the light intensity. This condition causes changes to the original lighting design and may not meet the requirements. Therefore, the aim of this research is to study the photometric distribution of LED and HSPV lamps based on simulation analysis. Both lamps are simulated using Dialux Evo simulation software by varying pole distances according to MS 825:2007 and BS EN 13201-2: 2004 standards. The study involves average luminance, overall uniformity, longitudinal uniformity, and threshold increment parameters. The results show that the average luminance value of the LED replacement lamps is lower than HPSV lamps, with a reduction of 52%. However, there is a minimal change in the light distribution pattern with an overall uniformity difference of 2% and a longitudinal uniformity difference of 18%. The results will be useful for local authorities and manufacturers to study on usage of different LED lighting systems. Energy consumption can be reduced while preserving the required lighting level.

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Investigation of photometric distribution of LED and HSPV for road lighting

Jamaludin,

Wan Ismail,

Husini

et al. 2023

J. Eng. Appl. Sci.

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Tarımda Yapay ve Ek Aydınlatma İçin Kullanılan Armatürlerin Teknik Analizi

Seyhan,

Seyhan

2024

Ziraat Mühendisliği

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Bitkilerin büyüme ve gelişmesi için su, karbondioksit, oksijen, besin maddeleri, sıcaklık ve ışık gibi çeşitli gereksinimleri bulunmaktadır. Bu ihtiyaçlar açıkta yetiştiricilikte doğal olarak sağlanmakta olup sera veya dikey tarım gibi sistemlerde doğayı taklit ederek bir kısmı veya tamamı yapay olarak sağlanmaktadır. Fotosentezde en yüksek verimi alabilmek için günlük aydınlık süresi, fotosentetik foton akı yoğunluğu, gün içinde toplanan fotosentetik foton sayısı gibi birtakım parametrelerin bilinmesi ve ideal şekilde sağlanması için gerekli hesaplamaların yapılması önem taşımaktadır. Bitkilerin ışıkla ilgili bu ihtiyaçları çeşitli kaynaklardan sağlanabilmektedir. Bitkilerin fotosentezde kullandığı ışığın spektrumu, şiddeti gibi özelliklerinin yanında gün içinde hangi süre ile ve bu süre içinde toplam ne kadar ışık aldığı da çok önemlidir. Bitkilerin türü ve çeşidi ile yetişme dönemine göre ihtiyaç duydukları ışık miktarı ve süresi değişkenlik gösterebilmektedir. Bu çalışmada bazı bitkilerin günlük ışık integrali ihtiyaçları üzerinde durularak bu ihtiyaçların sağlanması için kullanılan yapay ve ek aydınlatma armatürlerinden bazıları; enerji verimi, ışık etkinliği, spektral kalite, güç, IP koruma sınıfı, ömür gibi parametreler bakımından incelenmiş ve ışığın planlaması ve kontrolüne yönelik bilgiler verilmiştir.

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Study of LED Retrofit Lamps in HSPV Luminaires Based on Photometric Method for Road Lighting

Jamaludin,

Wan Ismail,

Mohd Husini

et al. 2024

JST

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Energy reduction is a great challenge in road lighting applications. Replacing high-pressure sodium vapor (HPSV) with light-emitting diodes (LED) is a viable approach to reducing energy consumption. However, a total replacement can incur a significant capital cost. This study aims to investigate the effects on light distribution by replacing HPSV lamps with LED lamps in HPSV luminaires using Light Intensity Distribution (LID) curve measurement and Backlight, Uplight and Glare (BUG) rating evaluation to reduce the adoption costs. While LED lamps have high illumination rates, the structural differences from HPSV lamps can affect the LID curve and original lighting design. Therefore, it is crucial to study photometric dispersion after retrofitting light sources. Both lamps were installed into similar HPSV luminaires to assess photometric performance using goniophotometer measurements. The HPSV lamp outperforms the LED lamp in terms of luminous flux (11.13%) and light intensity (7.69%), whereas the LED lamp outperforms the HPSV lamp in terms of efficacy rating (68.67%) and wattage used (47.61%). The findings indicate that retrofit LED luminaires have an LOR of 46.77% lower than the HPSV luminaires. The light distribution pattern is maintained but reduced to 40 to 50% for the main usable light angles. The reduced performance is caused by the lamp structure, which occupies a large area inside the luminaire housing, obstructing proper light distribution. Although overall energy consumption is reduced, similar illumination levels cannot be maintained. These outcomes can assist authorities and manufacturers with alternative methods of reducing costs while maintaining lighting levels.

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

Cited by 3 publications

References 65 publications

Investigation of photometric distribution of LED and HSPV for road lighting

Investigation of photometric distribution of LED and HSPV for road lighting

Tarımda Yapay ve Ek Aydınlatma İçin Kullanılan Armatürlerin Teknik Analizi

Study of LED Retrofit Lamps in HSPV Luminaires Based on Photometric Method for Road Lighting

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