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A simplified model for illuminance prediction has been developed to estimate the indoor level of lighting under artificial lighting. As well, illuminance in several locations of three schools has been measured under several conditions: Blinds up/lights on, blinds up/lights off, blinds down/lights on, blinds down/lights off. The experimental data of...
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Natural light is highly variable and limited in time and space. In situations where it is not or insufficiently available, Virtual Natural Lighting Solutions (VNLS) can be promising. This paper presents research based on computer simulation to explore the space-gaining potential of VNLS in offices, healthcare facilities, and industrial halls. The m...
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Our study evaluates the visual requirements regular classrooms impose on student’s vision. Up to 11% had visual acuity poorer than their classroom demands. In addition to frequent vision screening, strict measures are needed to regulate classroom standards for better learning.
Poster board# 062 205062
https://academy2020-aaopt.ipostersessions.com/default.aspx?s=AC-1D-0F-53-74-CF-0D-41-D9-53-CA-29-BB-20-EB-89
Lighting is an essential element in an academic environment which affects visibility and performance of visual tasks. This study assessed the illuminance quality and light distribution of the lighting systems used in thirteen classrooms in five different buildings in a Nigerian university for visual safety in handling the predisposed visual task in the classrooms under the IES standard recommendations for classroom work plane. The illuminance of the classrooms carried out on the students' works planes was through the instrumentation of a digital luxmeter (model HS1010). In each of the classrooms assessed, nine grid measurement points were considered, across the rows and down the columns. The measurements were conducted during the day between 8:00-10:00 am and at night between 8:00-10:00 pm. Analysis of classroom illuminance data obtained gave average ranges of 60-1837, 71-1979 and 0-82 lux for daylight, daylight + artificial light, and nighttime artificial lighting respectively. The classroom work plane illuminance standard showed 53.8, 54.7 and 0 percent compliance level for daylight, daylight + artificial light, and nighttime artificial lighting respectively. The three categories of lighting system assessed were all above the standard illuminance uniformity ratio of 0.3 for the perception to remain acceptable but for 7/12 (53.8%) of the classrooms on artificial light. Multiple independent-sample t-tests used for comparisons of illuminance obtained for the three categories of measurement on SPSS version 16.0 software at a confidence level of p<0.05 was invariably significant. The decline of the illuminance of the classrooms from the standard requires appropriate maintenance check for effectiveness.
