Assessment of Lighting Illumination in the Central Business District of Iloilo City
Keywords:
Urban lighting, Visibility, Visual comfort, Perceived safety, Street illumination, Human-centered design, Iloilo CityAbstract
This study assessed the quality of lighting illumination in the Central Business District (CBD) of Iloilo City, particularly Barangay San Rafael, by examining three key dimensions: visibility, visual comfort, and perceived safety. Using a quantitative, descriptive, comparative, and correlational research design, data were gathered from 187 respondents through a validated and highly reliable questionnaire measuring visibility (α = 0.92), visual comfort (α = 1.00), and safety (α = 0.94). Descriptive analyses revealed that visibility, visual comfort, and safety were consistently rated at High to Very High Levels, indicating that the existing lighting system generally supports clarity of surroundings, visual ease, and a sense of security during nighttime. Comparative analyses showed no significant differences in visibility, visual comfort, or safety based on sex. However, age, marital status, and educational attainment demonstrated significant differences across multiple indicators, suggesting that these demographic factors shape varying expectations and perceptual sensitivities toward lighting conditions. Notably, older adults, widowed respondents, and those with certain educational backgrounds tended to report higher levels of comfort and safety than younger and single respondents. Correlation analyses revealed very strong, positive, and statistically significant relationships among visibility, visual comfort, and safety (ρ = 0.904 to 0.974; p < .001). These results indicate that improvements in one aspect of lighting—such as brightness, color temperature, or light quality—enhance overall visibility and strengthen perceived safety in the area. Overall, the findings highlight that while current illumination in Iloilo City’s CBD is generally adequate, targeted lighting enhancements can further improve night-time experiences, particularly for younger adults and individuals with more stringent visual expectations. The study underscores the importance of human-centered, context-responsive lighting design in promoting safe, inclusive, and comfortable urban environments and provides empirical insights to guide future urban planning and smart lighting initiatives in Iloilo City.
References
ASEAN. (2022). Study on urbanization, people mobility, and inclusive development. Association of Southeast Asian Nations. https://asean.org/wp-content/uploads/2022/06/Study-on-Urbanization-People-Mobility-Inclusive-Development-FINAL.pdf
Bell, E., Bryman, A., & Harley, B. (2022). Sampling in quantitative research. In Business Research Methods. Oxford University Press. https://doi.org/10.1093/hebz/9780198869443.003.0020
Carlos, M. (2025, January 14). How road design can contribute to auto accidents and liability. Caroselli, Beachler & Coleman, L.L.C. https://www.cbmclaw.com/how-road-design-can-contribute-to-auto-accidents-and-liability/
Chen, R., Tsai, M.-C., & Tsay, Y.-S. (2022). Effect of color temperature and illuminance on psychology, physiology, and productivity: An experimental study. Energies, 15(12), 4477. https://doi.org/10.3390/en15124477
Custers, P., de Kort, Y., IJsselsteijn, W., & de Kruiff, M. (2010). Lighting in retail environments: Atmosphere perception in the real world. Lighting Research & Technology, 42(3), 331–343. https://doi.org/10.1177/1477153510377836
Dastgheib, S. (2018). Light and Perception of safety in-between buildings (pp. 19–24). KTH Royal Institute of Technology School of Architecture and the Built Environment.
Delloye , E. (2012, December 22). How lack of light harms our physical and mental health. Luminette. https://myluminette.com/en-int/blogs/article/harmful-effect-of-lack-of-light?srsltid=AfmBOoq7A5ARxSdHbPPl0YvNJ4w7VgLR8awohhTopwt4CWTvYRO0cKnm#start-article-section
Douglass, M., Quang, T., Cameron, L., & Yulinawati, H. (2003, December 1). Livability and mega-urban region dynamics in southeast asia. Unknown. https://doi.org/10.13140/RG.2.2.18981.68320
Frutos, L. de, Pellizzari, L., & Hvass, M. (2024). The influence of urban lighting on the sense of belonging. IOP Conference Series: Earth and Environmental Science, 1320(1), 012011. https://doi.org/10.1088/1755-1315/1320/1/012011
Hilario, L., Duka, J. A., Mabalot, M. I., Domingo, J., Vergara, K. A., Villanueva-Jerez, M. J., Cabello, K. A., Rufino, G. A., & Sarmiento, C. J. (2021). Forecasting urban population distribution of iloilo city using gis and spatial autocorrelation models. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, XLVI-4/W6, 185–192. https://doi.org/10.5194/isprs-archives-xlvi-4-w6-2021-185-2021
Johansson, M., Pedersen, E., Maleetipwan-Mattsson, P., Kuhn, L., & Laike, T. (2014). Perceived outdoor lighting quality (POLQ): A lighting assessment tool. Journal of Environmental Psychology, 39, 14–21. https://doi.org/10.1016/j.jenvp.2013.12.002
Liu, M., Zhang, B., Luo, T., Liu, Y., Portnov, B. A., Trop, T., Jiao, W., Liu, H., Li, Y., & Liu, Q. (2022). Evaluating street lighting quality in residential areas by combining remote sensing tools and a survey on pedestrians’ perceptions of safety and visual comfort. Remote Sensing, 14(4), 826. https://doi.org/10.3390/rs14040826
Mba, E. J., Okeke, F. O., Igwe, A. E., Ozigbo, C. A., Oforji, P. I., & Ozigbo, I. W. (2024). Evolving trends and challenges in sustainable architectural design; a practice perspective. Heliyon, 10(20), e39400. https://doi.org/10.1016/j.heliyon.2024.e39400
Navaraj, P., & Inkarojrit, V. (2024). Beyond illumination: Stakeholder perspectives on urban lighting master planning for chiang mai old city, thailand. Sustainability, 16(21), 9411. https://doi.org/10.3390/su16219411
Nazari, M., & Matusiak, B. (2024). Daylighting simulation and visualisation: Navigating challenges in accuracy and validation. Energy and Buildings, 312, 114188. https://doi.org/10.1016/j.enbuild.2024.114188
Nguyen, A. T., Truong, N. S. H., Rockwood, D., & Tran Le, A. D. (2019). Studies on sustainable features of vernacular architecture in different regions across the world: A comprehensive synthesis and evaluation. Frontiers of Architectural Research, 8(4), 535–548. https://doi.org/10.1016/j.foar.2019.07.006
Osibona, O., Solomon, B. D., & Fecht, D. (2021). Lighting in the home and health: A systematic review. International Journal of Environmental Research and Public Health, 18(2), 609. https://doi.org/10.3390/ijerph18020609
Pandey, P., Madhusudhan, M., & Singh, B. P. (2023). Quantitative Research Approach and its Applications in Library and Information Science Research. Access: An International Journal of Nepal Library Association, 2(01), 77–90. https://doi.org/10.3126/access.v2i01.58895
PhilAtlas. (2025). San Rafael, City of Iloilo Profile. Philippine Statistics Authority (for population and household data). https://www.philatlas.com/visayas/r06/iloilo-city/san-rafael.html
Taber, K. S. (2017). The use of cronbach’s alpha when developing and reporting research instruments in science education. Research in Science Education, 48(6), 1273–1296. https://doi.org/10.1007/s11165-016-9602-2
Thursfield, P., & vd Ven, R. (2022). Design principles for natural lighting. IOP Conference Series: Earth and Environmental Science, 1099(1), 012033. https://doi.org/10.1088/1755-1315/1099/1/012033
UN-Habitat & ASEAN. (2022). ASEAN sustainable urbanisation report. United Nations Human Settlements Programme (UN-Habitat) and Association of Southeast Asian Nations (ASEAN). https://unhabitat.org/sites/default/files/2022/12/asean_sustainable_urbanisation_report_final_dec_2022.pdf
Wu, S. (2014). Investigating Lighting Quality: Examining the Relationship between Perceived Safety and Pedestrian Lighting Environment. VTechWorks; Virginia Tech. http://hdl.handle.net/10919/48170
Zhang, L., & Shen, T. (2024). Integrating sustainability into contemporary art and design: An interdisciplinary approach. Sustainability, 16(15), 6539. https://doi.org/10.3390/su16156539
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