Next Article in Journal
Ageing Impact on the Economy and Emissions in China: A Global Computable General Equilibrium Analysis
Next Article in Special Issue
Energy Saving in an ETC Solar System to Produce High Temperature Water
Previous Article in Journal
Improving the Penetration of Wind Power with Dynamic Thermal Rating System, Static VAR Compensator and Multi-Objective Genetic Algorithm
Previous Article in Special Issue
Solar Reflector Materials Degradation Due to the Sand Deposited on the Backside Protective Paints
Open AccessArticle

Evaluation of Uniformity and Glare Improvement with Low Energy Efficiency Losses in Street Lighting LED Luminaires Using Laser-Sintered Polyamide-Based Diffuse Covers

1
Department of Graphic Expression, Design and Projects, Universidad of Málaga, 29016 Malaga, Spain
2
Department of Graphic Engineering Design and Projects, Universidad de Jaen, 23071 Jaen, Spain
3
A.T.P. Technical Lighting Public, 31194 Pamplona, Spain
*
Author to whom correspondence should be addressed.
Energies 2018, 11(4), 816; https://doi.org/10.3390/en11040816
Received: 28 February 2018 / Revised: 26 March 2018 / Accepted: 28 March 2018 / Published: 2 April 2018
(This article belongs to the Special Issue Urban Generation of Renewable Energy and Energy Saving in Cities)
Energy saving in street lighting is garnering more interest and has become a priority in municipal management. Therefore, LED luminaires are gradually becoming prevalent in our cities. Beyond their energy/economic saving potential, quality in public lighting installations concerns aspects such as uniformity and glare which must be maintained if not improved in any installation renewal project using this technology. The high light intensity generated in a discrete point in LED packages and its directional nature result in significant deficiencies in these last two parameters. To soften these effects, translucent covers are being used as one of the most common solutions with the drawback of significant light intensity losses. The objective of this paper is to evaluate the behavior of LED luminaire’s polyamide-based optical covers manufactured with a laser-sintered process. These are designed to improve glare and uniformity output, to minimize light output reductions, and to be industrially manufactured with no increment of cost for their lighting equipment compared to conventional transparent polycarbonate solutions. A laboratory and field lighting test study has been applied to different covers with the same LED lamp and luminaire to compare the performance of three different solutions built with different polymeric materials and with different light transmission surface textures. The photometric results have been observed and discussed to demonstrate the ability to significantly improve the lighting performance of LED luminaires—illuminance and uniformity levels and discomfort and disability glare indexes— using an improved optic cover. View Full-Text
Keywords: outdoor lighting; energy saving; sustainable cities; diffuse optics; photometry; uniformity; glare subject outdoor lighting; energy saving; sustainable cities; diffuse optics; photometry; uniformity; glare subject
Show Figures

Figure 1

MDPI and ACS Style

Gago-Calderón, A.; Hermoso-Orzáez, M.J.; De Andres-Diaz, J.R.; Redrado-Salvatierra, G. Evaluation of Uniformity and Glare Improvement with Low Energy Efficiency Losses in Street Lighting LED Luminaires Using Laser-Sintered Polyamide-Based Diffuse Covers. Energies 2018, 11, 816.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop