What are the standard illumination levels for different spaces?
Answers from top 12 papers
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| Papers (12) | Insight |
|---|---|
51 Citations | Results indicate that performance improves with illumination but by varying degrees for different conditions. |
| The results show that the shape of the illumination facula is close to the standard rectangle, and the efficiency and the uniformity of illumination is higher than traditional diffuse reflectors. | |
25 Aug 1996 29 Citations | We conclude that the original RGB color space is the best color space under varying illumination, the XYZ and CIELuv spaces being also very promising. |
| The method can be integrated into many different global illumination algorithms, including ray tracers and wavelet radiosity systems. | |
406 Citations | Theoretical analysis shows gradient faces is an illumination insensitive measure, and robust to different illumination, including uncontrolled, natural lighting. |
| Measurements of the daylight illumination levels and the performance of the lighting control system indicate that daylighting can provide over 70% of the required ambient illumination through the year. | |
| The local illumination matrix can be constructed and different types of illumination measurements can be derived. | |
25 Jun 2006 44 Citations | The results illustrate that for desired values of lighting performance in different internal spaces, there is often a range of possible panel configurations and costs. |
| By generalizing different strategies in handling illumination variations and evaluating their performances, several promising directions for future research have been suggested. | |
01 Jan 1999 | The proposed method is effective for estimating an illumination distribution even under a complex illumination environment. |
41 Citations | We conclude that the physical interpretation of extracted parameters at low illumination is to a large extent questionable, which explains errors based on standard scaling approaches. |
| Using this framework, we are able to avoid a unnecessarily dense sampling of the illumination and can estimate the entire illumination distribution more efficiently with a smaller number of sampling directions of the illumination distribution. |
Related Questions
What is the ideal illuminance level for a comfortable and productive working environment?4 answersThe ideal illuminance level for a comfortable and productive working environment varies depending on the specific context. Several studies have investigated the impact of illuminance on comfort and productivity. One study found that subjects felt more comfortable with warm correlated color temperatures (CCTs) and higher illuminance levels (3000 K–590 lux). Another study suggested that the highest performance and best cognitive task performance were achieved at illuminance levels of 500 lux and 750 lux. Additionally, a research study recommended illuminance levels of around 50-100 lux in coal mines to prevent accidents and maintain normal physiological indicators. It is important to note that illuminance levels below the recommended standard of 500 lux in office workstations can lead to health risks such as eyestrain, stress, and headaches. Therefore, it is crucial to adjust illuminance levels based on the specific requirements of the working environment to ensure both comfort and productivity.
What is lux range in a classroom?4 answersThe lux range in a classroom varies across different studies. One study found that the mean indoor illuminance for tasks on desks near windows exposed to direct sunlight and/or higher illumination ranged from 1,243 lux to 4,486 lux, while the mean indoor illuminance for tasks on desks near windows exposed to indirect sunlight and/or lower illumination ranged from 674 lux to 2,987 lux. The mean indoor illuminance for tasks on desks at the center of the classroom ranged from 101 lux to 449 lux, and the mean indoor illuminance for tasks on boards ranged from 110 lux to 494 lux. Another study measured the illuminance in a one-side-window oriented classroom building and found significant illumination variation, with under-lit areas on the un-windowed side and glare potentials on the side close to the windows. A prototype Bright Classroom had a median light intensity of 2,540 lux, which exceeded a traditional classroom but was less than outdoors. Another study found that 34% of classrooms had appropriate standard illuminance.
How does lighting level impact vision?5 answersLighting level has a significant impact on vision. Higher ambient illumination levels have been shown to improve visual performance, including acuity, contrast sensitivity, color discrimination, depth perception, and motion perception. On the other hand, low luminance levels can reduce visual performance, especially in low contrast conditions. Changes in lighting levels can also affect visual adaptation, with dark adaptometry and glare recovery being commonly used clinical tests. Additionally, lighting conditions can influence alertness and discomfort, with the orientation of light fixtures playing a role in participant sleepiness and weariness. Overall, lighting level is an important factor to consider in both indoor and outdoor environments, as it can impact visual acuity, contrast sensitivity, adaptation, and subjective experiences such as alertness and discomfort.
What is the comfort range of internal illuminance?5 answersThe comfort range of internal illuminance varies depending on the specific lighting conditions. In one study, participants were exposed to different light sources and illuminance levels, and were asked to rate their perception of brightness, glare, and comfort. Another study focused on the comfortable and acceptable illuminance levels for three-door refrigerators in different external lighting environments. A prediction model for indoor illuminance levels was developed using artificial neural networks and polynomial interpolation, resulting in an acceptable forecast with a mean absolute error of 8.9 lx. Additionally, research on window position in a room found that the optimal distribution of internal illuminance was achieved when the window was positioned in the middle of the wall. Overall, the comfort range of internal illuminance is influenced by factors such as light source, illuminance level, external lighting environment, and window position.
What is daylighting and lux level?4 answersDaylighting is the practice of using natural light to provide illumination in interior environments. It was commonly used in schools and workplaces in the past, but with the availability of inexpensive electricity and fluorescent lighting, it was abandoned in building codes. However, there is a growing recognition of the importance of daylighting in energy-efficient building design. Daylighting can help reduce energy consumption and create a more comfortable and visually pleasing environment. The level of illumination provided by daylighting is measured in lux, which is a unit of illuminance. Different studies have investigated the optimal illuminance levels for different spaces, such as classrooms and office rooms, and have found that it can vary depending on factors such as the location and the perception of the occupants.
What are the different light intensity?4 answersDifferent light intensities have been studied in various papers. The first paper by Kulchin et al. investigated the influence of light intensity on the growth and development of plants, specifically Stevia rebaudiana and Solanum tuberosum plantlets. They used an LED light source with intensities of 75, 135, 230, and 382 μmol/s*m2. Another paper by Li described a light intensity sensor that had a signal input checkout unit and a data processing unit. The sensor was capable of measuring and debugging light intensity. Dongsheng and Guangcai proposed a method for detecting light intensity using a light intensity detection unit with photoelectric conversion circuits and gating circuits. Finally, Kranjc's papers discussed the temperature dependence of photon number and radiation power density for different spectral compositions of light, such as laser or chaotic light.