Performance Evaluation of Natural Lighting in University Student Residence in Nigeria
DOI:
https://doi.org/10.54536/ajcec.v1i1.4873Keywords:
Bioclimatic Design, Building Performance Evaluation, Daylighting Performance, Energy Efficiency, Natural LightingAbstract
Natural lighting in residential buildings, especially student hostels, plays a critical role in promoting energy efficiency, visual comfort, and environmental sustainability. This study evaluates the performance of daylighting in selected private hostels in Ile-Ife, Nigeria, through an integrated methodological framework combining objective lux measurements, subjective perception surveys, and ethnographic observations of bioclimatic design features. Indoor and outdoor illuminance were recorded during daylight hours using a calibrated light meter, and daylight factors were computed in reference to CIBSE LG10 guidelines. Questionnaire data from 200 respondents were analysed using ANOVA and t-tests to explore student behaviours and satisfaction with lighting conditions. Observations revealed the prevalence of passive design features such as courtyards, large windows, and shading devices. The findings reveal a prevalent condition of poor daylighting performance, with DF values typically ranging from 0.0008% to 2.05%, significantly below internationally recommended minimums for conducive living and study environments. Despite these objective shortcomings, subjective occupant satisfaction exhibited variability, with a notable portion expressing contentment. Many students (43.0%) utilize their hostel rooms as primary study locations, frequently necessitating artificial light supplementation. Observed passive design strategies included internal courtyards, screening elements, shading provisions, fenestration characteristics, balconies, circulation corridors, and pre-paid energy metering systems. The study concludes a substantial dependence on artificial lighting, driven by inadequate natural illumination design, and recommends targeted education and enforcement of building design regulations prioritizing daylight access to enhance energy conservation, visual comfort, and overall occupant well-being.
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