TY - JOUR AU - AB - ENG ENGINEER - INEER - V V ol. XL ol. XL VIII, No. 01, pp. [11-20], 2015 VIII, No. 01, pp. [page range], 2015 © © The The Institution of Engineers, Sri Lanka Institution of Engineers, Sri Lanka Analysis on Energy Efficiency and Optimality of LED and Photovoltaic Based Street Lighting System Chandana S. Kulasooriyage, Satish S. Namasivayam and Lanka Udawatta Abstract: This study evaluates the optimality and energy efficiency of Light Emitting Diode (LED) and Photovoltaic based street lighting systems as a part of energy conservation. This evaluation is based on the detailed review carried out through a country wide street lamp survey. Since LEDs are becoming increasingly competitive due to their rapidly increasing efficiencies and decreasing cost, this research assessed the LED fixtures which have the capability of achieving 50% to 70% energy saving potential compared to the existing established technologies based street lamps available in the country. As a case study, illumination levels were examined at two neighbouring traffic junctions in the Capital City, from Bambalapitiya junction to Kollupitiya junction. Two kinds of measurements were taken and average luminance levels were analysed for all measured points in the traffic lanes. It was found that same lighting TI - Analysis on energy efficiency and optimality of LED and photovoltaic based street lighting system JF - Engineer: Journal of the Institution of Engineers, Sri Lanka DO - 10.4038/engineer.v48i1.6844 DA - 2015-01-23 UR - https://www.deepdyve.com/lp/unpaywall/analysis-on-energy-efficiency-and-optimality-of-led-and-photovoltaic-0ByK8m4F9E DP - DeepDyve ER -