DESIGN OF A LED LIGHTING DEVICE FOR GENERAL LIGHTING OF INDUSTRIAL AND OTHER PURPOSE ROOMS WITH HIGH SPAN

2021 ◽  
pp. 27-30
Author(s):  
N. P. Nesterkina ◽  
E. A. Kuznetsov ◽  
Yu. A. Zhuravleva
Keyword(s):  
Ray Tracing ◽  
Light Source ◽  
Energy Efficient ◽  
Luminous Efficiency ◽  
Luminous Efficacy ◽  
Led Lighting ◽  
Lighting Device ◽  
Protective Screen

The article is devoted to the design of a LED lighting device Laight Emitting Diode (LD) to replace the base LD with a gasdischarge light source for general lighting of industrial and other premises with high spans. The paper presents a description of the basic LD RSP 51 – 2000 and substantiates the need for its replacement. To create an LD with a high luminous efficiency, LEDs with a luminous efficacy of 142.2 lm/W at a rated current of 400 mA are used. When analyzing the results of ray tracing in the TracePro optical program for a flat and rounded protective screen of the LED LD, it was found that the most preferable is the use of a rounded protective screen made of Plexiglass. The results of modeling the LED LD showed that the designed LD is an energy efficient analogue of RSP 51 – 2000.

scholarly journals Towards DC Energy Efficient Homes

2021 ◽  
Vol 11 (13) ◽  
pp. 6005
Author(s):  
Daniel Villanueva ◽  
Moisés Cordeiro-Costas ◽  
Andrés E. Feijóo-Lorenzo ◽  
Antonio Fernández-Otero ◽  
Edelmiro Miguez-García
Keyword(s):  
Energy Efficiency ◽  
Electric Vehicles ◽  
Energy Efficient ◽  
Electricity Consumption ◽  
Real Data ◽  
Mean Values ◽  
Led Lighting ◽  
Shed Light

The aim of this paper is to shed light on the question regarding whether the integration of an electric battery as a part of a domestic installation may increase its energy efficiency in comparison with a conventional case. When a battery is included in such an installation, two types of electrical conversion must be considered, i.e., AC/DC and DC/AC, and hence the corresponding losses due to these converters must not be forgotten when performing the analysis. The efficiency of the whole system can be increased if one of the mentioned converters is avoided or simply when its dimensioning is reduced. Possible ways to achieve this goal can be: to use electric vehicles as DC suppliers, the use of as many DC home devices as possible, and LED lighting or charging devices based on renewables. With all this in mind, several scenarios are proposed here in order to have a look at all possibilities concerning AC and DC powering. With the aim of checking these scenarios using real data, a case study is analyzed by operating with electricity consumption mean values.

scholarly journals Towards the Optimum Light Source Spectrum

2010 ◽  
Vol 2010 ◽  
pp. 1-9 ◽  
Author(s):  
Andrew Chalmers ◽  
Snjezana Soltic
Keyword(s):  
Light Source ◽  
Large Scale ◽  
Source Spectrum ◽  
Light Sources ◽  
Luminous Efficacy ◽  
Light Emitting ◽  
Spectral Bands ◽  
Good Energy ◽  
Lighting Systems ◽  
Colour Rendering

This paper is concerned with designing light source spectra for optimum luminous efficacy and colour rendering. We demonstrate that it is possible to design light sources that can provide both good colour rendering and high luminous efficacy by combining the outputs of a number of narrowband spectral constituents. Also, the achievable results depend on the numbers and wavelengths of the different spectral bands utilized in the mixture. Practical realization of these concepts has been demonstrated in this pilot study which combines a number of simulations with tests using real LEDs (light emitting diodes). Such sources are capable of providing highly efficient lighting systems with good energy conservation potential. Further research is underway to investigate the practicalities of our proposals in relation to large-scale light source production.

Energy Efficient Embedded Systems for LED Lighting Control in Traffic

2019 ◽  
Author(s):  
Zlatko Bundalo ◽  
Momcilo Veljko ◽  
Dusanka Bundalo ◽  
Goran Kuzmic ◽  
Mirko Sajic ◽  
...  
Keyword(s):  
Embedded Systems ◽  
Energy Efficient ◽  
Led Lighting ◽  
Lighting Control

scholarly journals Optimization of LED Lighting for Clinical Settings

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Snjezana Soltic ◽  
Andrew Chalmers
Keyword(s):  
Light Source ◽  
Performance Criteria ◽  
Source Spectrum ◽  
Clinical Settings ◽  
Colour Properties ◽  
Led Lighting ◽  
Led Light ◽  
De Algorithm ◽  
Lighting Systems ◽  
Spectral Design

The advent of the LED light source has promoted the concept of human-centric lighting (HCL). The LED has also been responsible for increases in the electrical efficiency of lighting systems, coupled with recent improvements in their colour properties. We have found that it is also possible to create a lit environment with enhanced clinical attributes by providing a source spectrum that meets the requirements of the Cyanosis Observation Index (COI). This paper describes the use of a differential evolution (DE) algorithm for the spectral design of a mixed LED light source capable of meeting COI recommendations as well as HCL performance criteria.

Design of a combined lens for rectangular illumination

2018 ◽  
Vol 52 (1) ◽  
pp. 131-140
Author(s):  
Z Zhu ◽  
B Peng ◽  
J Yuan ◽  
X Xu
Keyword(s):  
Light Source ◽  
Diffuse Reflection ◽  
Design Method ◽  
Led Lighting

Rectangular illumination has found extensive application in the field of LED lighting. In this paper, a design method for a combined lens has used the two characteristics of refraction and diffuse reflection for rectangular illumination. The combined lens is composed of a cutting lens and a pedestal. We determined the cutting lens through the shape of the target plane and then applied diffuse reflection material to the partial surface of the pedestal. The diffuse reflection material is used to improve the lighting efficiency of the target plane. The surface of the pedestal is obtained by lofting from the contour of the cutting lens to the contour of plane where the light source is placed. Based on this method, the combined lens is designed for rectangular illumination. The result shows that the performance of the target plane meets the requirements of rectangular lighting. The uniformity is about 88% and the lighting efficiency is improved to 75%.

scholarly journals Sustainable Emergency Light for Scarcely Electrified Area of India

2021 ◽  
pp. 74-82
Author(s):  
Shrutirekha Tripathy ◽  
Mitali M. Sahoo ◽  
Nimay Chandra Giri ◽  
Siba Prasad Mishra ◽  
Smruti Ranjan Nayak
Keyword(s):  
High Risk ◽  
Solar Energy ◽  
Light Source ◽  
Power Supply ◽  
Low Cost ◽  
Luminous Efficiency ◽  
Remote Areas ◽  
Risk Areas ◽  
Lighting Systems ◽  
Grid Based

About 200 million people of India are deprived of grid based power supply, prominently in inaccessible hilly and rural hamlets of the country. Present research is an attempt to design, install, operate use, and maintain the hand on set of light source to address the unserved populations dwelling in electricity inaccessible areas in India. The approach is designing and developing a low cost sustainable or solar emergency light through, “Solar Home Lighting Systems” or “Sustainable Emergency Light” technology, which is one of the smart and innovative approaches of illuminating sources by harnessing solar energy to light the darkened places. The attractive daily usable gadget with surged luminous efficiency, durability, extended life, ecofriendly, compact, and efficient to work at both small values of current and voltages and they are growing acceptance. The safe and non-ignition start, is the uniqueness over conventional emergency light, and solar energy founded. The stand-alone device with mobile charging port with luminosity of 150 Lux can be used in lighting the escape routes, open areas and high risk areas. Under the crisis of pandemic of Covid-19 virus, the portable solar lights is  safe and riskless light source for the economic backward classes, and can provide the children and students for online undisrupted  study up to about 8 to 10 hours at low cost in remote areas.

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