핸드레일조명을 활용한 보행환경 조도에 관한 연구

이도훈,이은영,이돈일 한국공간디자인학회 2020 한국공간디자인학회논문집 Vol.15 No.5

(Background and Purpose) During the period of early civilization, humans developed the ability to make fire. Even today, the era of the LED, lighting continues to positively influence our lives, However, even the lighting effects us in a gpositive way, we are currently facing a problem in the form of the light pollution. Given that artificial lighting is a major cause of light pollution, it is imperative to consider the proposed pedestrian environment in accordance with the appropriate lighting requirements. This study suggests a safe, comfortable environment and level of the illumination using handrail lighting for the pedestrians. (Method) Accordingly, it distinguishes suitable lighting methods for the walking path by simulating the results of various installation methods in the handrail lighting environment. It also proposes appropriate product performance and installation methods and level of illumination that can be utilized for future reference for the implementation of handrail lighting conditions. In this backdrop, this study focuses on the spatial scope of the night pedestrian path using handrail lighting. In addition, it proposes suitable LED lighting performance proposals and optimized pedestrian illumination and walking environment proposals using Relux, a lighting simulation program. (Results) First, the optimized specification could be confirmed through handrail lighting for pedestrians in walking envrionment. Through the vertical plane analysis, it was confirmed that the most suitable light distribution was 60 degrees and the irradiation angle was 35 degrees. Second, in residential and commercial areas, one-way and central survey handrail types were found to be most suitable for the pedestrians. The horizontal illumination criterion was fulfilled at a distance of 1m between the lights. In the case of the bidirectional cross handrail lighting method, it was confirmed that it is suitable for commercial areas at the distance of 2m. Third, it was confirmed that the vertical pedestrian illumination of 5 ~ 10lx was satisfied even in the handrail lighting environment. Although the height of the lighting was as low as 1m, it was confirmed that the vertical illumination of 1.5m height satisfies the criterion. (Conclusions) This study focuses on illumination using handrail lighting in pedestrian paths and defines the basic specifications of lighting to prevent light pollution. In addition, the types of handrails and lighting intervals satisfying horizontal illumination were specified, and simulations confirmed that the vertical illumination of pedestrians could be fulfilled through handrail lighting. These findings could be considered as guidelines for future use of handrail lighting. (연구배경 및 목적) 인류가 문명의 시기로 접어들기 시작하면서 접하게 되는 것이 불빛이었고 오늘날에 LED조명의 시대에 이르게 되기까지 많은 발전을 해왔으며, 현재는 빛 공해에 대한 문제가 제기되고 있는 시점에 이르렀다. 이러한 인공적인 조명으로 인해 빛공해에 대한 다양한 피해가 발생하고 있으며 보행자 환경에 따른 적합한 조명의 제안과 보행환경에 대한 제안이 필요하다고 판단된다. 따라서 본 연구는 보행환경에서 핸드레일조명을 활용한 안전하고 편안한 환경과 그에 따른 조도 제안을 목적으로 한다. (연구방법) 이를 위해 보행환경별 적합한 조명방식을 구분하고 그 중 핸드레일조명 환경에서의 다양한 설치방법에 따른 결과를 시뮬레이션을 통해 도출하고자 한다. 본 연구의 주안점은 도시환경을 구성하는 요소 중 하나인 핸드레일조명이 야간 이용 보행자에게 적합한 환경을 제공하고 있는지 살펴보고, 연구자가 설계한 실험 및 시뮬레이션 도구를 통해 보행자에게 최적화된 조명, 조도환경을 제시하는 것이다. 연구의 범위는 보행공간을 구성하는 요소 중 하나인 핸드레일조명을 활용한 야간보행로를 공간적 범위로 하고, 적합한 LED조명 성능 제안과, 조명시뮬레이션 프로그램인 Relux를 활용하여 최적화된 보행자 조도환경 및 보행환경 제안을 내용적 범위로 하였다. (결과) 이를 통해 얻어지는 결론은 다음과 같다. 첫째, 보행환경에서의 핸드레일조명으로 최적화된 배광 사양이 60°임을 확인 할 수 있었다. 둘째, 주거·상업지역에서 편방향 및 중앙조사형의 핸드레일 유형이 가장 적합한 것으로 확인되었다. 셋째, 핸드레일조명 환경에서도 보행자 연직면조도 5~10lx를 만족함을 확인하였다. (결론) 본 연구는 보행환경에서의 핸드레일조명을 활용한 조도에 관한 연구로 빛공해 방지를 위한 조명의 기본사양을 정의하고 수평면조도를 만족시키는 핸드레일의 유형과 조명간격을 규정하였으며, 핸드레일조명을 통해 보행자의 연직면조도를 만족시킬 수 있음을 시뮬레이션을 통해 확인 할 수 있었다. 이러한 연구 결과를 통해 향후 핸드레일조명 설계 및 사용에 지침서가 될 것으로 기대한다.

시각기능이 저하된 고령자를 위한 주거공간 조명계획에 대한 연구

김묘철,김지현,김주연 한국공간디자인학회 2018 한국공간디자인학회논문집 Vol.13 No.1

(Background and Purpose) The Contemporary lighting is not limited to the simple function of illuminating spaces, but presented according to the purpose of space and user needs. With regard to the issue of aging—the biggest problem facing human society at present—guidelines for a lighting plan in residential areas is required for elderly people with decreased visual function. The daily lives of the majority of elderly people are inconvenienced by decreased visual function. However, the importance of lighting that occupies a large part of the indoor space is not properly recognized. Nevertheless, most of the lighting plans currently being universally applied are standardized and directed without consideration of the age group. Thus, this study aims to identify a measure for a lighting plan in residential areas for the elderly with the decreased visual function to improve these problems. (Method) With regard to research methods, this study investigated the aging of visual acuity, color misperception, and glare in the elderly through an exploration of the characteristics of the elderly. Accordingly, it also examined illuminance standards and lighting plans in lighting environments and residential areas for the elderly with decreased visual function. In addition, this study analyzed illuminance standards for the elderly and presented items of a lighting plan. This study then proposed a lighting plan for the residential area of a 34-pyeong apartment house, with each space based on the proposed items of the lighting plan, and verified the result using computer simulation. (Results) In rest areas, environments for glare prevention and uniform illumination were constructed, selecting light sources and applying multi-directional diffusion system and direct/indirect lighting system for the uniform distribution of illuminance in the spaces. In workspaces, light sources that could prevent color misperception and control color temperature were applied so that the elderly could use them according to their preference; while work surface illumination and uniform illuminance distribution in spaces were planned, and a top-down concentrated lighting system and a top-down diffusion lighting system were applied. For sanitary spaces, high color rendering type light sources were selected so that they would not feel inconvenient in activities and so that sufficient illumination was secured, while a top-down diffusion lighting system was applied. For other spaces, light sources with strong linearity were used, and a flow of human traffic was induced in moving between rooms, while a down-concentrated lighting system was applied. In doing so, measures for lighting plans were measured through simulation. In the derived result, it was found that the average illumination value is greatly increased compared to general residential areas, and it is argued that it is the result of the application of the right lighting plan for the characteristics and purpose of each space according to the light source and the method of the lighting plan. (Conclusions) Lighting plans in residential areas for the elderly with decreased visual function should properly select light sources for the visual characteristics of the elderly, as should the methods of lighting plans for the optimal use of each space to secure uniform illumination. Therefore, such a plan for lighting environments can be a measure for lessening the visual discomfort of the elderly and improving their quality of life. It is also argued that it is necessary to conduct multidisciplinary reviews and studies of the selection of light sources and methods of lighting plans in more elderly facilities in the future. (연구배경 및 목적) 현대의 조명은 단순히 공간을 밝혀주는 기능에만 국한되어 있지 않으며, 공간의 목적과 사용자의 니즈 등에 따라 연출된다. 현재 인류 사회에서 가장 큰 문제로 다가오는 고령화 문제에 대하여 시각기능이 저하된 고령자를 위한 주거공간 조명계획의 가이드라인이 필요한 상황이다. 대부분의 고령자들은 시각기능이 저하되어 일상생활에서 불편함을 느끼지만 실내 공간에서 많은 부분을 차지하고 있는 조명에 대해서는 아직까지 그 중요성에 대하여 인지하지 못하고 있는 실정이다. 그럼에도 불구하고 현재 보편적으로 적용되고 있는 조명계획은 연령층을 고려하지 않고 평준화 되어 연출되고 있는 경우가 대부분이다. 따라서 본 연구에서는 이러한 문제를 개선하고자 시각기능이 저하된 고령자를 위한 주거공간 조명계획 방안을 제시함에 그 목적이 있다. (연구방법) 연구 방법은 고령자의 특성에 대한 고찰을 통해 고령자의 시력의 노화, 색지각오인, 글레어에 대하여 알아보고, 이에 따라서 시각기능이 저하된 고령자를 위한 조명환경과 주거공간의 조도기준 및 조명계획에 대하여 고찰하였다. 또한 고령자 조도기준에 대하여 분석하고 조명계획 항목을 제시하였다. 이후 34평형 아파트의 주거공간을 제시된 조명계획 항목을 바탕으로 공간별 조명계획을 제시한 후 컴퓨터 시뮬레이션을 이용하여 결과를 검증하였다. (결과) 휴식공간의 경우 공간의 균일한 조도분포를 위한 광원 선정과 다방향확산 및 직간접 조명방식을 적용하여 글레어 예방과 균일한 조도환경을 구성하였다. 작업공간은 색지각 오인 예방 및 색온도 조절이 가능한 광원을 적용하여 고령자가 기호에 따라 사용할 수 있도록 하고, 하향집중, 하향확산 조명방식을 적용하여 작업면 조도와 공간의 균일한 조도분포를 계획하였다. 위생공간은 고연색성 광원을 선정하여 활동에 있어서 불편함이 없도록 하고 하향확산 조명방식을 적용하여 조도가 충분히 확보될 수 있도록 하였다. 기타공간의 경우 직진성이 강한 광원을 사용하고 하향집중 조명방식을 적용하여 실과 실 사이 이동 시 동선을 유도하였다. 이와 같은 조명계획 방안을 시뮬레이션을 통하여 검증하였다. 도출된 결과는 일반주거공간에 비하여 평균조도 값이 크게 상승함을 확인할 수 있었는데, 이는 광원과 조명계획 방식에 따라 각 공간별 특성과 목적에 맞는 조명계획 방식을 적용하여 나타낸 결과로 볼 수 있다. (결론) 시각기능이 저하된 고령자를 위한 주거공간 조명계획은 고령자의 시각특성에 맞는 적절한 광원 선정과 각 공간의 사용 목적에 알맞은 조명계획 방식, 그리고 공간별 균일한 조도의 확보가 필요하다. 이와 같은 조명환경 계획은 고령자의 시각적 불편함을 덜고 삶의 질을 높일 수 있는 방안이 될 수 있다. 향후에는 보다 다양한 고령자 시설에 대한 광원 선정과 조명계획 방식의 다각적인 검토와 연구가 필요 할 것으로 사료된다.

A Study on Performance Evaluation of Mixed Light Shelf Type According to the Angle of Light Shelf

Woori Chae,Heangwoo Lee,Yongseong Kim 보안공학연구지원센터 2015 International Journal of Smart Home Vol.9 No.1

A light-shelf, one of natural lighting methods, has advantages in constructability and economic feasibility in comparison with other passive natural lighting system. A movable light-shelf enables a user in a room to adjust the angle according to his or her preference to control the amount of indoor light. In addition, a light-self serves as a shield to the intense light on window sides when the solar light is strong to relieve glare. The purpose of this study was to investigate the effect of angle adjustment of a mixed type light-shelf on indoor natural lighting and determine efficient light-shelf lighting performance values by using an actual size test-bed. This study was conducted in the following procedures: 1) Previous studies were investigated to analyze the definition of a light-shelf and identify experimental factors for a light-shelf; 2) On the basis of previous studies, the light-shelf experimental factors were set up with reference to the illumination values under clear sky at the meridian transit altitude in each season to perform an experiment; and 3) The performance of the light-shelf was evaluated to examine the effectiveness. The performance evaluation was performed for each season according to the solar altitude of the mixed light-shelf. The indoor distribution of illumination was analyzed on the basis of the day light introduction depending on the angle of the mixed type light-shelf to verify the correlation with variables and the efficacy.

광고조명의 조명방식별 침입광 영향 범위 측정 및 시트지 부착을 통한 침입광 저감효과 분석

이규목,박형규,이규선,이종천,정현성,정준식,구진회 한국생활환경학회 2020 한국생활환경학회지 Vol.27 No.3

Light trespass significantly influences both advertisement and space lighting. Eleven types of advertisement lighting were investigated in this study by applying different light source output modifications to four types of advertisement lighting to reduce light trespass. The influence range of light trespass was checked and the effect of reducing light trespass using eight types of sheet applications to one type of channel letter-type was analyzed. As a result of measuring vertical illuminance and the range of light trespass influence, it was found that advertisement lighting types that satisfied the reference value of lingt trespass of 10 lx in residential areas within 10 m were 30 w and 79 w channel letter-types, 150 w internal LEDs, 800 W external halogen lights, and black background HALO lights. As a result of measuring the reduction in light trespass by attaching eight sheet types to the surface of advertisement lighting, light trespass reduction was found to be greater than 49% with seven sheet types and the maximum luminance reduction was greater than 47%.

Psychophysical research on switching between light emitting and reflecting modes of light adaptable display considering equal visibility

Kim, Seung-Ryeol,Lee, Seung-Hyuck,Kim, Jeong-Sik,Jeon, Dong-Hwan,Lee, Seung-Woo Elsevier 2017 Displays Vol.50 No.-

<P><B>Abstract</B></P> <P>Viewing high-luminance displays such as liquid crystal displays or organic light emitting diode displays under low-light conditions causes an unbearable glare, while viewing them with low luminance under bright-light conditions reduces visibility. Recently, several research groups have reported light adaptable displays (LADs) to extend display visibility over a wide range of light conditions. Here, we present a psychophysical study on how to effectively utilize the LAD using two different display types for the first time. LAD features two switchable display types: light emitting mode (LEM) and light reflecting mode (LRM). To maintain visibility and prevent visual artifacts, we investigate when to switch modes between LEM and LRM. We conduct psychophysical experiments involving seventy subjects. They are asked to select illuminance levels under which they perceive that the LEM and LRM look the same depending on luminance of the LEM. We propose a mode-switching condition by combining our previous results on the comfortable luminance of LEM display according to the ambient illuminance and the selected illuminance results providing equal visibility of both LEM and LRM displays.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We investigate illuminance conditions to switch modes of light adaptable display. </LI> <LI> LAD has light emitting mode (LEM) and light reflecting mode (LRM). </LI> <LI> We find out illuminance where LRM and LEM with different luminance look similar. </LI> <LI> We use our investigation on optimum display luminance depending on illuminance. </LI> <LI> We combine the previous results with current one to find out when to switch modes. </LI> </UL> </P>

상용 조명해석 프로그램(Relux)을 이용한 가로등 주택침입광 예측값과 실측값 비교

정대관(Dae-Kwan Jung),박형규(Hyung-Kyu Park),정준식(Joon-Sig Jung) 한국산학기술학회 2018 한국산학기술학회논문지 Vol.19 No.1

빛공해의 주택 침입광은 현장에서 여러 환경 요인에 의해 정확한 평가가 쉽지 않다. 그래서, 현장에서의 측정 어려움을 대신하여 빛공해의 영향을 파악하기 위하여 시뮬레이션 프로그램(Relux 등)을 이용하여 분석하였다. 그러나, 침입광에 대한 실제 측정값과 시뮬레이션을 통한 예측값은 여전히 차이점이 존재한다. 본 연구에서는, 옥외조명에 대한 침입광을 조사하기 위하여 서울, 인천 등 측정지점을 선정하였다. 조도 측정은 주택창면 중 연직면 조도가 높을 것으로 예상되는 창문 밖 창면 2지점 이상의 측정지점을 선정하여 측정하였다. Relux 프로그램을 이용하여 예측된 값 중 최대값을 실측값과 비교하였다. 그 결과, 침입광 실측값과 예측값의 오차는 –0.97~0.65 lx(최대값[2.08lx]과 최소값[-7.70lx] 제외) 조사되어졌다. 주택창면을 기준으로 도로조명의 설치위치 높이(H), 거리(L), 너비(W)가 가까이 위치될수록 침입광은 높아짐을 알 수 있었다. 상용 조명해석 프로그램(Relux)을 사용하여 예측값을 측정하는데 있어서 주변 환경 요인과 측정자의 오차 등으로 인해 실측값과 다소 오차가 발생하였다. 본 연구에서는 측정수가 많지 않아 차후 연구에서 좀 더 많은 데이터를 이용하여 분석할 필요가 있다. The assessment of the light trespass in terms of light pollution is difficult due to the complexity of light environments. As a result, the light pollution research has examined the influences of light pollution using simulation program such as RELUX. However, there still exists a differences between the real measurement value and the simulation value for the light trespass. In this paper, we analyzed the light trespass using the RELUX simulation program, and compared results with real measurement values. In this study, the regions (Seoul, Incheon, etc.) were investigated regarding the light trespass for outdoor lighting. The survey of vertical illuminance was analyzed measuring point (more than 2 point) out the window that was expected to light trespass for the higher anticipated to illumination. The illuminational predicted values for the RELUX program were compared with maximum one. As a result of this study, the illuminational errors between the measurement values and predicted values for the simulation were examined from -0.97 lx to 0.65 lx except 2.08 lx and -7.70 lx. The light trespass was analyzed the higher by how much the located close to the height, length, width of the outdoor lighting for the window. For measuring predicted values using RELUX, it was not sufficiently considered in the simulation conditions because of environmental factors and investigator error etc. Limitations of this study include the limited number of measurements, and greater field data is required in future studies.

선행 EEG 실험연구 분석을 통한 공간의 조명요인에 관한 연구

김영진 ( Youngjin Kim ),김주연 ( Jooyun Kim ) 한국공간디자인학회 2018 한국공간디자인학회논문집 Vol.13 No.2

(Background and Purpose) Today, modern people have different living patterns from those in past lifestyles. Many people’s activity patterns are now characterized by nighttime activity. In addition, these changes in living patterns affect many social environments and require new adaptive environmental factors to be developed and changed. In particular, as the density of cities increases, nighttime activity in the country also increases; thus, illuminance, which is the lighting factor used, is increasing. Night light in public places creates light pollution, which is a problem. In such a situation, there is a lack of academic foundations or standards for the fundamental light of light pollution, and there is no study of human perception, requiring cognitive standards for new lighting factors. In this respect, the purpose of the study is to synthesize results regarding lighting factors based on the contents of the previous EEG experiments on lighting factors. (Method) Accordingly, this study aimed to survey previous EEG experimental studies on lighting and to analyze them by item. As a result, studies published from 2001 to 2016 were analyzed on the basis of the method of drawing items. Specifically, the actual conditions of experimental research, theses and items, experimental conditions and lighting, experimental equipment, and variables were analyzed. In this way, this study aimed to summarize analysis results regarding illumination intensity and color temperature in the hypothetical aspect for the most essential components of lighting. (Results) According to the analysis of previous EEG experimental studies on lighting components, it was found that they lack cognitive research results for future experiments on the intensity of illumination, color temperature, color rendering, and brightness as components of lighting. In the analysis of previous studies, the higher the illumination intensity, the stronger the arousal; the higher the color temperature, the greater the work concentration. However, they did not offer standard data for future experiments and did not offer important research hypotheses. (Conclusions) As fundamental research analyzing and summarizing previous studies in order to establish the cognitive scope and contents for environmental guidelines regarding lighting components, this survey study can provide a basic database for future EEG experiments. A future EEG experimental study aims to analyze cases of lighting components, measure contents, and thus establish the cognitive scope and contents of the lighting environment based on the reaction of brain waves recognized by the human body.

출신지 위도에 따른 선호 조명환경에 대한 기초적 연구

양정순(Jung-Soon Yang) 한국조명·전기설비학회 2017 조명·전기설비학회논문지 Vol.31 No.6

Humans have adapted and evolved under the constantly changing natural light. At this paper, it started the research under the assumption that the perception of light environment is different according to geographic environment such as latitude. Based on color temperature, intensity of illumination, and lighting method, it investigated the preference response to readability for people with various latitudes and derived lighting data on light environment preference according to their native latitude groups. It was found that for those people who have lived long hours under the strong light near the equator through the analysis process, they prefer the high illumination level and the high color temperature in the space environment for reading. The people lived in the ‘latitude 35°~40°’ and ‘latitude 15°∼20°’ range hasve been similarly evaluated for readability of the light environment. Although it is evaluated differently depending on the illumination level and the illumination method, the suitable color temperature for the illumination environment in the reading environment is 4000K, which is suitable for the illumination environment in the reading environment. In particular, 4000K with of 700lx of direct illumination or the mix of direct and indirect illumination use is are preferred. Although there are limitations on various kinds of experiments on in the experimental variables, the preferable illumination environment of different latitude has more influenced by the color temperature rather than the illumination method or the change in the illuminance levels. the illumination direction for the readability function in the presented condition is preferable to the illumination environment according to the latitude of the hometown according to the color temperature rather than the illumination method or the illumination change in the range of illumination, The difference was significant. This study has significance in raising the importance of experimental study on the light environment based on latitude which is the overlooked geographical environment.

영상조명용 144[W] LED 스폿 등기구 개발에 관한연구

이장원,임지원 한국인터넷방송통신학회 2010 한국인터넷방송통신학회 논문지 Vol.10 No.5

본 연구에서는 무대 방송용 LED 스폿 조명기구를 자체적으로 설계, 제작하여 조도, 배광 및 색온도를 측정하였으며, 동일한 피사체를 LED 조명과 텅스텐 할로겐 조명을 번갈아 설치하여 인물의 영상을 카메라로 촬영한 영상을 비교하여 LED 조명기구의 대체 가능성을 연구하였다. 촬영한 피사체를 분석한 결과 LED 144[W] 조명기구가 텅스텐 할로겐 1[kW] 조명기구보다 더 영상이 밝기와 색감 면에서 더 우수하였다. 144[W] LED조명기구와 텅스텐 할로겐 1[kW] 조명기구의 사용 에너지를 측정한 결과 동일 조도기준으로 LED가 80[%] 이상의 에너지 절약효과가 있는 것으로 나타났다. 할로겐 텅스텐 1[kW] 조명기구와 LED 144[W] 조명기구의 배광과 조도 분포를 비교 검토한 결과 피사체를 집중적으로 조명하는 경우, 피조면의 조도가 높아 효과적인 조명이 가능하다. 6[m]정도 천고의 공연장이나, 스튜디오에서는 LED144[W] 조명기구는 조도 문제가 없어, 기존의 텅스텐 할로겐 1[KW] 조명기구를 1:1로 대체하는 것이 가능하다. This study manufactured spot lighting fixtures for the broadcasting stage and LED lighting fixtures, measured the illumination, dimming, and color temperature, and installed LED lighting and spot Fresnel lighting to the camera by turns with the same subject to confirm and look into the possibility of replacement of LED lighting fixtures by shooting the figures and comparing them. The analysis of the photographed subject found that the lighting apparatus of LED 144[W] was superior to the tungsten halogen illuminator of 1 [kW] in terms of brightness and color of an image. The measuring of the energy used in 144 [W] LED lighting equipment and tungsten halogen 1[kW] lighting equipment suggested that LED saved more than 80 [%] of energy in the same intensity of illumination. The comparison of the light distribution and light intensity distribution of halogen tungsten illuminator of 1[kW] and LED 144[W] lighting apparatus found that when a subject received concentrated lighting, effective lighting is possible because the illumination intensity on the surface of the lighted subject was high. In performance halls or studios of about 6 [m] height, there is no problem of illumination intensity in LED 144 [W] illuminator. Therefore, it is possible to replace the existing tungsten halogen 1 [KW] illuminator one to one.

광천장 회의실 조명환경에 대한 인지적 평가에 관한 연구

이진숙(Lee, Jin Sook),정찬웅(Jeong, Chan Ung) 한국색채학회 2017 한국색채학회 논문집 Vol.31 No.2

The lighting design standard of the existing meeting room is presented with space illuminance as a starting point, and it is specified without taking into account the relations between an occupant’s viewpoint and working surface. In this regard, in the light design elements of a meeting room, an occupant’s emotional indicator of visual environment elements should be reflected, and optimum lighting environment in the light of behavioral characteristics is required. This study proceeded with the lighting propriety research consequent on behaviors when the luminous ceiling meeting room was lit, and deducted the lighting design standard based on the sensation scale (glare, fatigue degree, visibility and preference). The research results are as follows: First, In time of a projector meeting by partial lighting of a luminous ceiling, the ideal lighting environment was found to be 4500 K, 50 lx(20 lx for lights-down surface), and in time of a general meeting by the whole lighting of a luminous ceiling, 4500 K, 400 lx was evaluated as the most ideal lighting environment. In addition, in time of the first half by the whole lighting of a luminous ceiling, 3000 K, 600lx was evaluated as the most ideal lighting environment. Accordingly, this standard should apply to the scenario by behavioral characteristic in time of system lighting design based on the luminous ceiling of a meeting room.