• Title, Summary, Keyword: Lighting

Search Result 3,508, Processing Time 0.044 seconds

Empirical Evaluation of Optimal User-Centered LED Lighting Environments in Residential Bathrooms

  • Lee, Jeongmin;Choi, Kyungah;Suk, Hyeon-Jeong
    • Science of Emotion and Sensibility
    • /
    • v.16 no.3
    • /
    • pp.305-310
    • /
    • 2013
  • This user-centered research aims to empirically evaluate color temperature (K) and illuminance (lx) of residential bathroom lightings to determine the most optimal lighting conditions for productive task performance as well as for satisfying users' emotional needs. Using 3 LED lighting fixtures, 4 types of lighting contexts were investigated; main lighting, task lighting, shower lighting, and bath lighting. Two lightings were installed parallel to the vertical edges of the main bathroom mirror to be used as main and task lighting, while another fixture was installed above the bathtub to be used for shower and bathing. For each lighting context, subjects (N=54) were instructed to perform a few tasks during which time the users were exposed to different lighting conditions with color temperature ranging from 2700 K ~ 6500 K and illuminance ranging from 100 lx ~ 700 lx. Upon completing the given tasks, subjects were asked to evaluate the lighting conditions and their applicability for performing the given tasks. Based on the user evaluations, the most optimal lighting conditions for the different lighting scenarios are as follow: 1) 3500 K ~ 4300 K and 150 lx for main lighting, 2) 3500 K ~ 4300 K and 500 lx ~ 700 lx for task lighting, and 3) 2700 K ~ 3500 K and 100 lx ~ 150 lx for shower/bath lighting. These results can be used to adjust the lighting standards suggested by KS, as well as be utilized by both engineers and designers in designing new types of user-centered bathroom lightings.

  • PDF

A Literature Analysis of User Acceptance of Unified Glare Rating of LED Lighting in Office (업무공간 LED 조명의 사용자 수용 UGR에 관한 문헌분석)

  • Lee, Su-Jung;Yoon, Hea-Kyung
    • Journal of the Architectural Institute of Korea
    • /
    • v.36 no.11
    • /
    • pp.257-264
    • /
    • 2020
  • This study aims to propose the proper Unified Glare Rating (UGR) levels of light-emitting diodes (LED) lighting in office spaces. It would be the basis data for the development of LED lighting for them. A literature review was investigated regarding the effects of background luminance, luminance, solid angle, and position index on office users' discomfort glare for fluorescent lighting and LED lighting in office spaces. The recommended UGR for the spaces is 19 or below and it was found that lighting that causes discomfort glare is located within the user's field of view or in the line of sight. Discomfort glare within field of view was categorized as ceiling lighting and discomfort glare in the line of sight was categorized as wall lighting. In the case of ceiling lighting, discomfort glare of UGR≤19 resulted for fluorescent lighting with luminance of 4000 cd/㎡ and LED lighting with luminance of 2800 cd/㎡. For wall lighting, discomfort glare of UGR≤19 resulted for fluorescent lighting with luminance of 2844 cd/㎡ and LED lighting with luminance of 1800 cd/㎡. The discomfort glares of office space ceiling and wall lightings were analyzed and found to be greater for LED lighting than for fluorescent lighting. Therefore, discomfort glare of UGR≤16 needs to be considered for LED lighting in office spaces.

An Analysis on the Outdoor Lighting Situation and Policies in Korea, China, Japan - focused on Seoul, Shanghai, Yokohama- (한국·중국·일본의 도시경관조명 현황 및 정책 분석 - 서울, 상하이, 요코하마를 중심으로 -)

  • Ahn, Hyun-Tae;Kim, Jeong Tai
    • KIEAE Journal
    • /
    • v.3 no.3
    • /
    • pp.35-42
    • /
    • 2003
  • It is required impressive expression of urban night environment that makes city as the safe pleasant, convenient place for the economic activity, cultural pleasure and landmarks. This study aims to establish the proper direction to the outdoor lighting in Seoul by analyzing and comparing the lighting situation and policies among Seoul, Shanghai and Yokohama. 1986 Asian Game and 1988 Olympic Game became very important role of activation of outdoor lighting in Korea. Then, outdoor lighting were facilitated in the cultural heritages and bridges along Han river. Millenium Light Plan, Outdoor Lighting Field of Seoul Architectural Award, 2002 Lightscape Local Plan, hosting 2002 World Cup have been good opportunities for the improvement of outdoor lighting in Seoul. In China, outdoor lighting was introduced to the city of Shanghai according to the orders of the president in 1988. Outdoor lighting of Shanghai have created unique lighting with beautiful color and intensive brightness under the direction of city government. Outdoor lighting of Shanghai needs the standard of lighting design and improvement of lighting facilities. Outdoor lighting was introduced to Japan with 1964 Tokyo Olympic games. Urban outdoor lighting plan was carried out in Yokohama in 1986. In Yokohama, outdoor lighting of civilian and public facilities have been harmonized. And the city government of Yokohama established the committee of promotion of outdoor lighting in its government to support and manage the outdoor lighting with corporation of civilian organization. As the result of comparative analysis on Seoul, Shanghai, Yokohama, Seoul Metropolitan Government needs the criteria and incentive system of outdoor lighting.

Effectiveness of Road Lighting on Driver' Vision (도로조명 방식이 운전자 시지각에 미치는 영향)

  • Jeong, Jun-Hwa;Lee, Suk-Ki;Kim, Won-Sik;Lee, Mi-Ae
    • International Journal of Highway Engineering
    • /
    • v.14 no.4
    • /
    • pp.125-131
    • /
    • 2012
  • PURPOSES : Road lighting facilities increase the visibility of road at night in order to improve traffic driver safety and comfort. Generally speaking, current pole lighting has a tendency to create problems of glare and flicker. The phenomenon of glare gives discomfort due to increase of scattered light, when high luminance is in driver's field of view. The phenomenon of flicker occurs due to the driver passing through discontinuous pockets of pole lighting areas. These phenomenon increase eye strain and decrease driver safety. METHODS : Low height line lighting that distributes light lower than driver's eye level has been developed and evaluated to reduce the problems linked to current pole lighting. A test was undertaken with 4 conditions(turn on the general pole lighting, turn off alternate pole lighting, turn on the line lighting and line lighting with 50% dimming). A driver written survey was conducted in order to gain driver feedback. RESULTS : Pupil size and brow frequency compared with degree in pole lighting are reduced. CONCLUSIONS : Low height line lighting environment makes drivers more comfortable than pole lighting environment and is positive lighting method in the energy saving and landscape aspect.

A Study on Daylight Control Method for Securing Visual Comfort and Reducing Lighting Loads on Interior Lighting Environment (실내조명환경의 시각적 쾌적성 확보 및 조명부하 저감을 위한 채광제어방법에 관한 연구)

  • Han, Sang-Pil
    • Journal of the Korean Solar Energy Society
    • /
    • v.32 no.6
    • /
    • pp.100-105
    • /
    • 2012
  • In previous study, to investigate the impression of the compound lighting based on the AC-Model at the full-size room, the impressions of various compound lighting were completed as compared with that of the uniform lightings through the comparison method (a paired comparison) by Semantic Differential scaling. Also, we examined the effect of the supplementary lighting type increasing the lights at the side of the window and the blind-control lighting type, and they were compared with the existing compound lighting type. In results, pared comparison of the compound lighting and the uniform lighting, indicates that the impression of the compound lighting is generally similar to that of the uniform lighting when there are same ratios of the light from the window. Based on these results, we suggest that the AC-Model might be applied to various conditions. And we also introduce the method for daylighting that it is possible to reduce discomfort glare and to improve visual impressions as the supplementary type and blind-control type on the compound lighting. And it was found that electric power consumption of the compound lighting room was lower than that of the uniform lighting room when as same lighting ratio of the compound lighting and the uniform lighting from the window was provided or there was the lighting distribution simulated to same light ratio from the window. Since the method of the ACModel was described in the experimental condition, additional studies should be performed to determine if this model could be applied to different window configurations, lighting layout and types of a room.

A preliminary Study and suggested Evaluation Methodology for the Improved Fashion Shop Lighting Design using Museum Lighting Design (박물관 전시조명 방식을 적용한 패션 매장의 조명환경 개선에 관한 사전 연구 및 평가방법론 제안)

  • Ko, Tae-Kyoung;Kim, In-Tae;Choi, An-Seop
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
    • /
    • v.29 no.4
    • /
    • pp.37-46
    • /
    • 2015
  • Lighting in a fashion shop has an effect on customers, highlights the products on the shelf, and has become more important. Even though lighting has a significant effect on customers, the studies on fashion shop lighting have primarily focused on how to create lighting which can influence customers' purchase behavior, and their awareness and expectation. On the contrary, it's been hard to find a study on a quantified fashion shop lighting plan considering customer confidence. In a current fashion shop lighting plan, display lighting is planned indiscreetly. Therefore, this study conducted an investigation of the light environment of the current fashion shop and museum exhibits lighting. Through such processes, the possibility of applying fashion store display lighting environments was investigated. Finally, for the assessment of museum exhibitions lighting applying fashion store display lighting environments, a subjective evaluation method using light simulation was proposed.

A Experimental Study the Wall Lighting focus on Rate of Illuminance : in case of fluorescent lamp and hallogen lamp (조도 비를 중심으로 한 벽면진열대의 조명실험연구 : 형광램프와 할로겐램프를 중심으로)

  • 김현지;안옥희
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
    • /
    • v.18 no.2
    • /
    • pp.1-7
    • /
    • 2004
  • This experimental study investigates the wall display of shoes shops among the commercial space to suggest a desirable lighting by focusing on the lighting on the lighting surroundings. The important outcomes of this study are summarized below. The result of the experiment for the wall lighting: For the wall lighting, which needs a diversity, there should be various light source or bigger rate of illuminance between the ambient lighting and the local lighting. There is another possibility that is we can use the lower rate of illuminance with the ambient lighting and the local lighting or higher illuminance generally. The other wall lighting, which need a luminance and a emotional response, will be more effective as they take the lower rate of illuminance with the ambient lighting and the local lighting or higher illuminance generally.

Verification and Development of Lighting Design Data for Office in Korea (Focused on the Evaluation of Lighting Energy and Cooling Load) (사무소를 위한 조명설계 자료의 개발과 검증 (조명에너지와 냉방부하를 중심으로))

  • Kim, Eun-Hee;Suh, Seung-Jik
    • Proceedings of the SAREK Conference
    • /
    • /
    • pp.1043-1048
    • /
    • 2006
  • This paper aimed to verify and develop lighting design data for offices in Korea. It focused on a Korean standard office value relative to lighting density and the evaluation of lighting energy and cooling load. When planning indoor lighting design, we generally utilize the lighting density value which is set $14W/m^2$ by the ASHRAE/IES standard office value. However, the value is not appropriate to apply in Korea where higher efficiency lamps are more popular than others. For calculation of a proper lighting density of Korea, we analysed distribution curves of luminous intensity(2-lamp fluorescent lighting fixture with Parabolic) and derived the new lighting density $12.64W/m^2$ as Korea standard office value. In the simulation using this value, it was shown that lighting energy and cooling load could be reduced.

  • PDF

Decision of Lighting Power Density for Office Building Lighting (사무용 빌딩의 조명전력 허용기준 연구)

  • Lee, Sang-Jin;Lee, Min-Wook;Kim, Hoon
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
    • /
    • v.26 no.1
    • /
    • pp.22-28
    • /
    • 2012
  • To identify energy savings when comparing lighting designs or evaluating installed lighting, it is necessary to analyze the consumption of lighting power with respect to the electricity consumed and the lighting area. In Korea, however, these factors have not been considered in lighting design. In this paper, the lighting power-related standards on indoor lighting in foreign countries have been analyzed. It is determine appropriate lighting power consumption for indoor by calculating the energy consumption has been estimated in a lighting design adopted domestic luminaire used.

A Study on Development of LED Lighting Module and Control System for Plant Growth (식물 성장용 LED조명 모듈 및 제어 시스템 개발에 관한 연구)

  • Lee, Seung Min;Lee, Wan Bum
    • Journal of the Semiconductor & Display Technology
    • /
    • v.18 no.4
    • /
    • pp.105-109
    • /
    • 2019
  • LED lighting is used as artificial lighting for plant growth because it has high light efficiency and can radiate light of various wavelengths. In this paper, we have developed new structure LED lighting module to improve the performance of LED lighting for plant growth and proposed a lighting control system that can be controlled wirelessly. The proposed LED lighting module was fabricated using optical lens applied to tunnel light and simulated using Relux program. Results of simulation, we confirmed that the light distribution and average illuminance of the proposed lighting were improved. LED lighting control system was developed to wirelessly control R, G, B, W LED lighting according to plant type and growing season. Therefore, it is expected to provide the optimal lighting environment for plant growth and contribute to the improvement of farm productivity and convenience.