Relevant bibliographies by topics / Uniformity of lighting

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Uniformity of lighting'

Author: Grafiati
Published: 28 June 2021
Last updated: 30 May 2022

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Journal articles on the topic "Uniformity of lighting"

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Wänström Lindh, Ulrika, and Annika K. Jägerbrand. "Perceived Lighting Uniformity on Pedestrian Roads: From an Architectural Perspective." Energies 14, no. 12 (June 18, 2021): 3647. http://dx.doi.org/10.3390/en14123647.

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Lighting uniformity is a key factor in traffic safety, and it could even result in energy savings for light installations. However, highly uniform horizontal road lighting for motorized vehicles may not be optimal for pedestrian roads. Therefore, it is important to evaluate the way in which pedestrians experience road lighting uniformity. Accordingly, we employed a qualitative approach to examine pedestrian road lighting uniformity. Visual analyses were used to exemplify and discuss the perceived uniformity. The case studies were performed on three pedestrian roads with similar light installations. The results show that the experience of road lighting uniformity differs substantially between the three roads. Based on the case studies, there are many aspects that need to be considered beyond the light falling on the horizontal surfaces. This study suggests that the visual experience of road lighting uniformity for pedestrians is difficult to estimate with photometric values because the visual impact of uniformity is highly influenced by the spatial context and landscape.
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Bouroussis, Constantinos A., and Annika K. Jägerbrand. "Simulations and Analysis of the Optimum Uniformity for Pedestrian Road Lighting Focusing on Energy Performance and Spill Light in the Roadside Environment." Energies 15, no. 9 (April 19, 2022): 2983. http://dx.doi.org/10.3390/en15092983.

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Road lighting uniformity is an essential lighting quality parameter for motorists and pedestrians and varies with lighting design parameters. Increased road lighting uniformity may result in benefits, such as increased reassurance and perceived safety for pedestrians or an increased overall visual perception. However, no previous study has investigated how road lighting uniformity varies with lighting design scenarios or how the uniformity of various lighting design scenarios affects other essential parameters, such as energy performance and obtrusive light. This study aimed to investigate: (I) how uniformity varies with different road lighting design scenarios, and (II) how uniformity correlates with energy performance and risk for increasing spill light. The study is limited to pedestrian roads. We performed photometric calculations in ReluxDesktop for more than 1.5 million cases with single-sided pole arrangements and for various geometries of road width, pole distance, pole height, overhang, and luminaire tilt. The results were analyzed with a set of five relevant metrics that were calculated and analyzed together with uniformity. For the evaluation, we used the minimum luminaire power needed to achieve an average illuminance of 10 lx, the power density indicator (DP), edge illuminance ratio (REI), and we introduced two new indicators for spill light on the ground in the border areas: the extended edge illuminance ratio (extended REI) and the spill flux ratio (RSF). The results show that increased uniformity levels may significantly increase energy consumption and spill light, but that both these impacts can be relatively controlled if uniformity is kept under certain limits. The investigated cases also demonstrated that improper lighting planning significantly increases adverse effects, such as spill light.
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Hu, Zhang Fang, Jian Wei Mao, and Yuan Luo. "Research on LED Lighting Secondary Light Distribution by Using a Freeform Lens." Applied Mechanics and Materials 103 (September 2011): 138–41. http://dx.doi.org/10.4028/www.scientific.net/amm.103.138.

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Application of semiconductor lighting is widespread, so its secondary light distribution design of the LED for lighting plays an important role. For LED road lighting applications, its uniformity of illumination need to meet certain requirements, a freeform surface using freeform optical lens was designed, in the secondary light distribution. Because of the application of freeform lens, LED lighting illumination uniformity has been improved. Lighting simulation and analysis, results indicate that based on freeform lens, LED lighting has good illumination uniformity, and has well research, development and application prospects.
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Rakutko, Sergey A., and Elena N. Rakutko. "Assessment of Lighting Uniformity as a Factor of Energy Efficiency in Greenhouse Horticulture." Engineering Technologies and Systems 31, no. 3 (September 30, 2021): 470–86. http://dx.doi.org/10.15507/2658-4123.031.202103.470-486.

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Introduction. Greenhouse lighting systems are an integral part of the system for growing plants in cultivation facilities with an artificial microclimate. The uniformity of light distribution over the growing area is important to increase energy efficiency and improve plant quality, among other requirements. The aim of the work is to consider the mathematical apparatus for describing the distribution of light over the surface and to justify the choice of ways to characterize the degree of lighting uniformity. Materials and Methods. The basic concepts of the subject area such as lighting, lighting body, horizontal lighting curve, luminous intensity curve are considered in terms of theoretical photometry. To assess the energy and ecological friendliness of the greenhouse horticulture, the lighting efficiency factor was used. Various methods for determining the average lighting value are presented. The formulas for the uniformity coefficients are presented. Experimental verification was carried out on a horizontal plane simulating a surface for growing plants. A luminary with a round-symmetric light distribution was used. Results. It has been found that the lighting values calculated by the proposed method at various points of the illuminated surface correspond to the experimentally obtained values. It has been shown that the coefficient taking into account the pattern of lighting distribution over all points of the surface carries a lot of information about the uniformity. A frequency graph for the lighting distribution value has been constructed and its practical applicability has been substantiated. The relationship between the lighting efficiency and uniformity of the generated lighting has been revealed. With reduced suspension height of the luminary, it is possible to increase significantly the lighting efficiency factor, however, the lighting uniformity deteriorates sharply. Discussion and Conclusion. There is proposed a method for assessing the energy efficiency by the lighting efficiency factor, which determines the proportion of the useful lighting falling on the surface in the total lighting generated by light sources. It is suggested that this indicator can characterize the ecological quality of photoculture, since it has been established its relationship with the uniformity of the created lighting, the impact of which on photoculture is described in the literature.
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Shimomura, Y., M. Shimizu, Y. Tanabe, and T. Arakawa. "Illuminance and uniformity in street lighting." JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN 83, Appendix (1999): 134. http://dx.doi.org/10.2150/jieij1980.83.appendix_134.

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Houser, Kevin W., Minchen Wei, and Michael P. Royer. "Illuminance Uniformity of Outdoor Sports Lighting." LEUKOS 7, no. 4 (April 1, 2011): 221–35. http://dx.doi.org/10.1080/15502724.2011.10732148.

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Pracki, Piotr, and Rafał Krupiński. "Brightness and Uniformity Perception of Virtual Corridor with Artificial Lighting Systems." Energies 14, no. 2 (January 13, 2021): 412. http://dx.doi.org/10.3390/en14020412.

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This article compares the brightness and uniformity perception of virtual corridor displayed on computer screens and under different surrounding conditions, between two groups of respondents. The computer simulations of 10 lighting scenarios in the empty corridor, diverse in terms of luminance distribution and lighting power density, were developed. The visual assessment of the lighting effects was carried out on the basis of surveys. The respondents assessed the brightness and uniformity of each plane and entire corridor for each scenario, using semantic differential scaling. Each person from the first group individually made their evaluations on the same computer screen placed in the experimental box. Each person from the second group made the assessments on different computer screens, and all respondents from this group made the evaluations in the computer room at the same time. A high convergence of the results between the groups was found in the assessments of brightness and uniformity perception for consecutive lighting situations. In 93.75% of cases, the same perception in brightness and uniformity between the group means was achieved. A high convergence of the results between the groups in the assessment of brightness and uniformity perception for the same lighting situations was also demonstrated.
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Eble-Hankins, Michelle L., and Clarence E. Waters. "Illuminance Uniformity Filter for Theatrical Lighting Fixture." LEUKOS 6, no. 1 (July 1, 2009): 91–99. http://dx.doi.org/10.1582/leukos.2009.06.01005.

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Jeong, Kyeong Ah, Chanyang You, and Hyeon‐Jeong Suk. "Preference for luminance uniformity of refrigerator lighting." Color Research & Application 46, no. 1 (September 17, 2020): 146–54. http://dx.doi.org/10.1002/col.22571.

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Huang, Guang Yow, Hsien Te Lin, and Tzu Ching Su. "A Study on the Energy Conservation Efficacy of Secondary-Reflection Lighting Design Adopted in a Conference Hall." Applied Mechanics and Materials 71-78 (July 2011): 2447–51. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.2447.

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A conference hall is a large meeting space that requires high-wattage lighting equipment to provide sufficient illumination. Ceiling lights are not easy to maintain and cause glare in the seating area. This study simulates the interior lighting of the International Conference Hall in the Magic School of Green Technology (MSGT) using high efficiency ceramic metal halide lamps that replace the general design luminaires, and PL and fluorescent lamps. We use the secondary reflection of light to reduce glare and improve lighting uniformity. The results show that high efficiency lighting can reduce by 25% the standard lighting equipment and still provide the same illumination levels. Furthermore, the overall conference hall lighting uniformity increases from 0.59 to 0.78.
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Dissertations / Theses on the topic "Uniformity of lighting"

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Oravčok, Ján. "Návrh optického systému LED svítidla." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442473.

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The first part of the thesis is research, which deals with electric luminaires and especially their light-active parts. Subsequently is described the problem of a specific luminaire, which is used during the control of the surface structure of materials. The next part of the thesis deals with the simulation of the current luminaire and the simulations of the proposed solutions that eliminate the shortcomings of the luminaire. The conclusion of this thesis is the evaluation of the originally used luminaire and the benefits of the proposed solution, which showed the best results in the simulation.
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Маїло, Роман Васильович, and Roman Mailo. "Розробка системи освітлення транспортно-логістичного центру." Master's thesis, Тернопільський національний технічний університет імені Івана Пулюя, кафедра електричної інженерії,Тернопіль, Україна, 2020. http://elartu.tntu.edu.ua/handle/lib/33203.

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Проведено моделювання та світлотехнічний розрахунок системи робочого освітлення приміщень транспортно-логістичного центру, в результаті якого вибрано світлові прилади та визначено їх кількість. Встановлено, що для забезпечення нормованої освітленості приміщення на робочій поверхні 150 лк та коефіцієнта нерівномірності освітлення не нижче 0,6 складського приміщення розміром 99 на 36 м та висотою 10,15 м необхідно використати 54 світильники типу ДСП37В потужністю 80 Вт та 12 світильників потужністю 100 Вт з кривою сили світла типу Л. Результати розрахунку показали, що використання такого набору світлових приладів створює середню освітленість на робочій поверхні 163 лк з коефіцієнтом рівномірності 0,621.
У кваліфікаційній роботі розроблено проект систем робочого та аварійного освітлення транспортно-логістичного центру із загальною площею складських, адміністративних та допоміжних приміщень 5057,71 м2.
In the qualification work the project of working and emergency lighting systems had been developed for warehouse, administrative and auxiliary premises with the total area of of 5057.71 m2 of the transport and logistics center.
ЗМІСТ ВСТУП 5 1. АНАЛІТИЧНИЙ РОЗДІЛ 7 1.1. Аналіз та класифікація будівель транспортно-логістичних центрів 7 1.2 Вимоги до систем освітлення складських будівель 11 1.3.Висновки до розділу 17 2. ПРОЕКТНО-КОНСТРУКТОРСЬКИЙ РОЗДІЛ 19 2.1. Характеристики приміщень будівлі об’єкта проектування 19 2.2. Вихідні дані для світлотехнічного розрахунку системи освітлення 20 2.2.1.Вибір нормованих параметрів системи освітлення 20 2.2.2. Вибір джерел світла та світлових приладів 22 2.3. Вихідні дані до електротехнічного розрахунку освітлювальної установки приміщень транспортно-логістичного центру 28 2.4. Електротехнічний розрахунок електричної освітлювальної мережі та вибір перерізу проводів 33 33 2.5. Висновки до розділу 40 3. РОЗРАХУНКОВО-ДОСЛІДНИЦЬКИЙ РОЗДІЛ 42 3.1. Аналіз методик та засобів розрахунку освітлювальних установок 42 3.2. Моделювання та світлотехнічний розрахунок освітлювальної установки транспортно-логістичного центру 47 3.2.1. Моделювання та світлотехнічний розрахунок робочого освітлення 47 3.2.2. Моделювання та світлотехнічний розрахунок аварійного освітлення 52 3.3. Висновки до розділу 57 4 4. ОХОРОНА ПРАЦІ ТА БЕЗПЕКА В НАДЗВИЧАЙНИХ СИТУАЦІЯХ 58 4.1. Аналіз технічних заходів на логістичних підприємствах щодо попередження електротравм 59 4.2. Оцінка ефективності заходів забезпечення охорони праці та техніки безпеки на робочих місцях транспортно-лоігстичних центрів 61 4.3. Аналіз заходів щодо попередження надзвичайних ситуацій на підприємстві 63 ЗАГАЛЬНІ ВИСНОВКИ 66 ПЕРЕЛІК ПОСИЛАНЬ 68
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Larsson, Klara, and Markus Sarah Lindeskog. "Att Ljussätta Ett Rum : En ljusstudie och ljussättning av en sjukgymnastikavdelning." Thesis, KTH, Byggvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-174184.

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Ljus påverkar människan psykiskologiskt och fysiskt, trots detta är de krav som idag finns på belysningen inte tillräckliga för att beakta de miljöegenskaper ljuset bidrar med. Ett visst ljus i kombination med en viss färg och material påverkar människan på olika sätt. De krav som ställs tar bara hänsyn till de tekniska aspekterna. Hur ljus estetiskt påverkar ett rum är en faktor detta arbete tar hänsyn till, då det påverkar människans välmående. Detta projekt behandlar två olika rum, ett rum för träning och behandling samt ett väntrum på en sjukgymnastikavdelning tillhörande Södersjukhuset i Stockholm. Dessa två rum har genomgått en ljusstudie och ljusplanering med syfte att skapa en ljussättning som är anpassad för sitt ändamål och som upplevs trivsam och behaglig. Vissa skillnader mellan projektets framtagna förslag och ett verkligt projekterat förslag har även jämförts. För att genomföra ljusstudien och ljusplaneringen har beräkningar utförts i belysningsprogrammet RELUX. På grund av att ljus inte enbart kan simuleras med hjälp av datorprogram har även fysiska modeller byggts för att analysera valet av färgtemperatur. Studiebesök på sjukgymnastpraktiker och träningsanläggningar har gjorts för att få inspiration. Även intervjuer med sjukgymnaster har gjorts för att få förståelse för vilka faktorer som måste tas hänsyn till vid en ljusplanering för denna typ av verksamhet. Litteraturstudier har gjorts för att få en djupare kunskap i hur ljus agerar i olika miljöer. Ljusplaneringen har resulterat i en jämn och god belysning i de två rummen. Kraven för belysning enligt SS-EN 12464–1:2011, har uppfyllts. Ljuskällornas färgtemperaturer har fastställts med hänsyn till färgerna i rummen, varmvit i väntrummet och neutral i tränings-/behandlingsrummet. Armaturer med uppljus och nedljus har valts i syfte att minska bländning och luminansskillnader. Downlights har valts för att belysa väggar och föremål. För att skapa en upplivande atmosfär i rummen har även dekorbelysning använts. Slutsatsen av detta arbete har visat att det är viktigt att ta hänsyn till en jämn belysning, anpassa belysningen och ljuskällans färgtemperatur efter färgsättning och material samt att anpassa belysningen efter alla synuppgifter som kan komma att krävas av personen som skall utföra arbetsuppgifter i rummet.
Light affects humans psychologically and physically, despite this the lighting requirements does not pay regard to the environmental characteristics that light contributes with. A specific light in combination with a specific color and material affects the human being in different ways. The lighting requirements only takes the technical aspects into account. In this project consideration will be given to how the light aesthetic affects the well-being. In this project two rooms will be processed, a waiting room as well as a room meant for rehabilitation. The rooms are placed in a building that includes physiotherapy at Södersjukhuset in Stockholm. The rooms have participated in a light study to create a light environment that is adjusted to its purpose as well as it is pleasantly perceived. Some differences between this lighting project and an actual lighting project have been compared. To perform this light study, various calculations have been done in the lighting planning software RELUX. Light can not solely be simulated with computer software, therefore physical models have been built to analyze the choice of color temperature. Visits to physiotherapy practices and training facilities have been done for inspirational purposes. Interviews with physiotherapists have also been done to reach a better understanding of what factors are needed to be taken under consideration while planning the lighting. Literature studies have been made to get a deeper knowledge in how light reacts in different environments. The lighting planning has resulted in an even lighting in both rooms. The requirements for lighting according to SS-EN 12464-1:2011 have been fulfilled. The different color temperatures of the light sources have been determined regarding the colors of the rooms, warm white in the waiting room and neutral in the rehabilitation room. Armatures with up and down lights have been chosen with the purpose of decreasing glare luminary differences. Downlights have been chosen to lighten up the walls and various objects. To create an uplifting atmosphere in the room, decor lighting have also been used. The conclusion of this work has shown that it is important to take luminance uniformity, adapt the light and color temperature to the room and its colors and materials into account. It is also important to adapt the light to all the different visual works that can take place in the room.
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Huang, Yu-Chieh, and 黃昱傑. "DESIGN AND FABRICATION OF HIGH UNIFORMITY LED LIGHTING FITTING." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/17102976651422705528.

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碩士
大同大學
機械工程學系(所)
97
LED (light emitting diode) has advantage of energy-saving, environmental, and durable, so it will substitute for traditional lamp and CCFL (cold cathode fluorescent lamp); nevertheless, there are some disadvantages for characteristic of LED in the substitute process. For high power LED, it has high brightness intensity but the region of light-extraction area is too small. It will produce nonuniformity of illumination in this region by using in short distant illumination. It have to be fitted some lampshade and lighting fitting, or to design the array places. It is important to retain the luminance and to increase the uniformity of high power LED at same time. Try to fabricate the LED lighting fitting by molding technique. It will change the ray direction by tracing the lighting fitting, to let the luminance more uniformity than before. In this study, succeed in fabricating the high uniformity LED lighting fitting. At the height of 200mm, it can let the region of the illumination suiting to read and write enlarge to 150mm, and the uniformity of illumination in the region of 150mm promote to 66.1%.
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Hai-LiYang and 楊海莉. "Tube photobioreactor lighting module design for increasing irradiance uniformity." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/92326655583057746748.

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碩士
國立成功大學
物理學系碩博士班
100
In the era of energy over-exploitation, looking for sustainable renewable energy has become an important issue. Biomass energy has gradually become one of the most potential energy. In all of the plants which are capable of producing oil, the microalgae have the largest oil-producing efficiency and the least cultivated field. In this thesis, we design a lighting module for tube photobioreactor so as to create an environment with uniform irradiance. With the property that “the light-exiting positions at tube lightguide are related to the light incident angle”, this thesis optimizes the radiant intensity distribution curve of the incident light for making the irradiance on the target surface is uniform. In the final design, the radiant intensity distribution curve of the input Lambertian light source was modified by a freeform lens. Passing the constructing light source through a tube lightguide with simple surface structures creates a light distribution with uniform irradiance at the target surface. Compared with the previous study, uniformity improve remarkably. The value of CV(RMSE), abbreviation of coefficient of variation of root mean square error, outside the light guide tube can reach 0.18, and can reach 0.13 inside the light guide tube.
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Wong, Cheng Jhang, and 翁澄璋. "A Study of the Uniformity of LED lighting with Flat-Convex Lens." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/nzudsf.

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碩士
崑山科技大學
機械工程研究所
96
This paper use TracePro optical simulation software to simulate three LED light source with the domed acrylic (PMMA) as a lens to a virtual light source. General lamp and simulated work environment to play in the optical absorption screen, the LED light source and by adjusting the distance between the lens and light source. Simulation different results show that the average illumination is about 522 lux, the uniformity is about that satisfies the CNS regulations.
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Chen, Meng-Kai, and 陳孟凱. "Evaluation of lighting glare considering its brightness uniformity and establishment of glare rating predicting model." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/97519842659594251130.

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碩士
國立臺灣科技大學
光電工程研究所
103
Because of energy saving and efficiency, people would like to use LED as the parts of the products in recent years, instead of using traditional light sources. However, in agreement with earlier work, it can be concluded that point-array type of LED luminaires could provoke more discomfort glare, non-uniform emitting surface than traditional light sources. In this study, two experiments were designed to analyze visual comfort effect and visual fatigue degree of the white LEDs with / without nano-wire grid polarizer. A novel 2D colorimeter was used to analyze the uniformity of the two lighting types (polarized and unpolarized LEDs) in the first experiment. In the second experiment, a visual assessment way was used to analyze visual comfort degrees under different conditions between two lighting types. Critical flicker fusion (CFF) method was utilized to analysis the degrees of physiologically visual fatigue before and after experiment, then the participants were asked to answer subjectively visual fatigue questionnaire. The aim of the second experiment was to find the relation between the subjective assessment and the physiological assessment. Finally the results were tested for adjusting the Unified Glare Rating formula defined by CIE. And the goal is to derivate the modified formula for non-uniform white LED arrays, which is named C-UGR(Contrast UGR).
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Book chapters on the topic "Uniformity of lighting"

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Yan, Hainan, Yiting Zhang, Sheng Liu, Ka Ming Cheung, and Guohua Ji. "Optimization of Daylight and Thermal Performance of Building Façade: A Case Study of Office Buildings in Nanjing." In Proceedings of the 2021 DigitalFUTURES, 168–78. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-5983-6_16.

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AbstractIn China's hot summer and cold winter areas, the façade design of buildings needs to respond to a variety of performance objectives. This study focuses on the optimization of daylight and solar radiation of building façade of office buildings in Nanjing and proposes a simple and efficient method. The method mainly includes a random sampling of design models, simplified operation of daylight performance criteria and selection of optimal solution. The results show that the building façade can improve the indoor lighting uniformity and reduce the indoor illumination level compared with the unshaded reference building. Besides, the amount of solar radiation received by office buildings in summer and winter becomes more balanced with the building façade. The optimization design method of building façade proposed in this study can be of guiding significance for office buildings in Nanjing.
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Baeza Moyano, David, and Roberto Alonso González Lezcano. "The Importance of Light in Our Lives." In Practice, Progress, and Proficiency in Sustainability, 239–56. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-7023-4.ch011.

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The light that enters through our eyes is not only for vision. The human circadian system responds to light differently than the visual system. The timing of each biological function in mammals is directed by the main clock located in the Supraquiasmic Nucleus, which is regulated by light. However, until now, only the interaction of light with our visual system has been taken into account when choosing the parameters of indoor lighting sources, including those in the classroom. In the publications about school lighting, the first concern was the common parameters of indoor lighting such as horizontal workplane illuminance, illuminance uniformity, and avoiding reflections on different surfaces. In this chapter, the authors show publications about new findings on the effects of light on people, studies carried out in different countries aimed at improving classroom lighting, current regulations on lighting related to classroom lighting, and new parameters that are being considered, along with those already used for new and better lighting.
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"Freeform Optics for LED Lighting with High Spatial Color Uniformity." In Freeform Optics for LED Packages and Applications, 307–33. Singapore: John Wiley & Sons Singapore Pte. Ltd, 2017. http://dx.doi.org/10.1002/9781118750001.ch10.

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Gallyamova, Tatyana R., Aleksey L. Vozmischev, Nicolai V. Khokhriakov, Vladimir G. Baltachev, and Svetlana Y. Ponomaryova. "On Efficiency Rising of the Technological LED Lighting for the Floor Poultry Keeping." In Advances in Environmental Engineering and Green Technologies, 123–48. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7573-3.ch005.

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A method for solving the problem of the uniform LED illumination for the floor maintenance of birds is proposed. On the basis of physical modeling, the dependences have been obtained between the geometric dimensions of the poultry house and the coefficient of uniformity of illumination with the purpose of optimization of the parameters on which the energy consumption and quality of illumination depend. The method has been used to estimate the values of the optimal parameters of the functioning system. Thus, in the poultry house of 78m x 18m, four lines of LED lamps have been installed for illumination, 40 pieces per each line. With the computer calculations of illuminance, estimates of the optimal values have been obtained: the total number of LEDs is equal to 1920 and allocated over 120 lamps instead of 160 previously used, which allows predicting a fall in actual energy consumption by 25% with an irregular illumination coefficient being 1.13. Based on the developed and manufactured LED lamp, the applicability of the mathematical model has been experimentally justified.
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Conference papers on the topic "Uniformity of lighting"

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Hu, Yu, Ming Ronnier Luo, and Yang Yang. "A study on lighting uniformity for LED smart lighting system." In 2015 12th China International Forum on Solid State Lighting (SSLCHINA). IEEE, 2015. http://dx.doi.org/10.1109/sslchina.2015.7360705.

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Wittels, Norman, and Michael A. Gennert. "Optimal lighting design to maximize illumination uniformity." In Photonics for Industrial Applications, edited by Donald J. Svetkoff. SPIE, 1994. http://dx.doi.org/10.1117/12.198855.

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Huertas, R., M. J. Rivas, Manuel Melgosa, M. Sanchez-Maranon, S. Bhosle, and J. J. Damelincourt. "Uniformity of lighting in color assessment cabinets." In 19th Congress of the International Commission for Optics: Optics for the Quality of Life, edited by Giancarlo C. Righini and Anna Consortini. SPIE, 2003. http://dx.doi.org/10.1117/12.530343.

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Lou, Di, and Yingdong Wei. "Vertical Illuminance Uniformity for LED Road Lighting." In 2021 18th China International Forum on Solid State Lighting & 2021 7th International Forum on Wide Bandgap Semiconductors (SSLChina: IFWS). IEEE, 2021. http://dx.doi.org/10.1109/sslchinaifws54608.2021.9675282.

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Wänström Lindh, Ulrika, and Annika K. Jägerbrand. "IMPACT OF QUALITATIVE AND QUANTITATIVE METHODS ON THE EVALUATION OF STREET LIGHTING UNIFORMITY." In CIE 2021 Conference. International Commission on Illumination, CIE, 2021. http://dx.doi.org/10.25039/x48.2021.op53.

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Uniformity of lighting for pedestrians is often assumed to have been achieved in mixed traffic environments when the lighting uniformity requirements for vehicular traffic have been fulfilled. Uniformity of lighting for drivers is commonly evaluated based on quan-titative data on parameters such as overall luminance uniformity. However, methods for evaluating uniformity from the perspective of other road users are currently somewhat lacking. This study discusses qualitative and quantitative methods of assessing street lighting uniformity, and the potential implications for lighting design and the road us-ers. We used convergence design and imbedded design based on two field studies. The research purpose is twofold: first, to study if, and how, measured lighting uni-formity corresponds with visual perception. Secondly, to identify and explain the addi-tional value that a combined method approach can contribute. The study considers ex-amples of when the measured uniformity corresponds to visually perceived uniformity and when they do not correspond.
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Lu, Runjiao, and Min-chih Hsieh. "Effect of Illuminance Uniformity on Paper-Based Reading Performance." In Human Systems Engineering and Design (IHSED 2021) Future Trends and Applications. AHFE International, 2021. http://dx.doi.org/10.54941/ahfe1001160.

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Previously the effect of illuminance and correlated color temperature (CCT) on reading performance had been evaluated. However, the influence among uniformity of illuminance, illuminance, and CCT had not been closely taken into account. Therefore, the aim of current study was to investigate how a particular trait of lighting conditions affected reading performance. The indoor lighting environment was conducted with two uniformity of illuminance and two light conditions. Reading tasks of finding out the incorrect characters and grammatical errors in the manuscript were carried out and the brain activities were recorded by electroencephalogram (EEG). The reading performance was evaluated by signal detection theory (SDT). The results showed that the participants performed better under high illumination uniformity and the lighting condition of 400lx and 3000K. According to the results, this study might inspires the design of indoor lighting in workplace so that working efficiency and quality could be further improved.
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Lei, Peng, and Hongjiang Gao. "Algorithm design of lighting uniformity problem for large venue." In 2011 3rd International Conference on Computer Research and Development (ICCRD). IEEE, 2011. http://dx.doi.org/10.1109/iccrd.2011.5764163.

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Byun, Woon-Jo, Ye-Seul Jin, Young-Won Kim, and Jae-Hyun Lim. "Design of Lighting Control System Considering Lighting Uniformity and Discomfort Glare for Indoor Space." In 2018 International Conference on Platform Technology and Service (PlatCon). IEEE, 2018. http://dx.doi.org/10.1109/platcon.2018.8472750.

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Chen, Yu-Hsuan, Chi-Hung Lee, Jou-Hui Lin, and Shih-Hsin Ma. "Analyzing of light pattern uniformity in multi-chips LED lighting." In SPIE Optical Engineering + Applications, edited by R. Barry Johnson, Virendra N. Mahajan, and Simon Thibault. SPIE, 2014. http://dx.doi.org/10.1117/12.2061552.

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Boucher, V., S. Buschmann, F. Greffier, V. Muzet, and S. Voelker. "KEEPING THE BENEFIT OF ILMD’s HIGH RESOLUTION IN MEASURING LIGHTING QUALITY PARAMETERS." In CIE 2021 Conference. International Commission on Illumination, CIE, 2021. http://dx.doi.org/10.25039/x48.2021.op55.

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The dimensioning of lighting installations is performed according to the specifications of CIE documents and relevant standards. Differences are often observed between simulations and experimental measurements regarding the quality criteria and luminance distributions. This paper deals with road lighting quality parameters evaluation between experimental ILMD images and calculations. Influence of image rectification is first examined. Impacts of image resolution, grid resolution and grid positioning on average luminance, overall uniformity and longitudinal uniformity are evaluated. An elliptical method based on human eye resolution and perspective projection is presented for road lighting calculations. It conducts to a good robustness regarding misalignment and give access to a pixel-to-pixel comparison with experimental ILMD images.
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