Urban Public Space Illumination Practice and City Beautification in the Inner-City Corridor of Addis Ababa: Spatial, Architectural, and Energy Implications
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Date
2026-09-01
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Addis Ababa University
Abstract
Urban illumination has become an important component of contemporary urban development and city beautification, influencing the spatial quality, architectural expression, nighttime experience, and energy performance of urban environments. In Addis Ababa, recent corridor development and beautification initiatives have introduced extensive decorative street and façade lighting along major inner-city corridors. However, the extent to which these practices respond to existing spatial structures, architectural character, public-space needs, and energy sustainability remains insufficiently understood. This study investigates urban illumination practices and their spatial, aesthetic, perceptual, and energy impacts in the inner-city corridors of Addis Ababa. A mixed-methods case study approach was employed, combining field observation, photographic documentation, GIS-based spatial analysis, technical lighting assessment, questionnaire surveys, institutional inquiry, and nighttime illumination analysis. A total of 280 questionnaires were used to examine perceptions of visual comfort, glare, spatial integration, architectural quality, and energy utilisation. Technical assessment considered lighting specifications, installed wattage, fixture quantities, operating duration, spatial distribution, and relevant illumination requirements, while GIS and nighttime satellite imagery were used to examine the spatial distribution and broader patterns of urban illumination. The analysis was organized around four domains: formal and regulatory consistency, spatial and visual integration, illumination as a medium of architectural and urban perception, and sustainability and operational management. The findings indicate that illumination has improved nighttime visibility and contributed to corridor beautification and visual presence, but its integration with the existing urban environment remains inconsistent. Decorative street lighting was frequently found to have weak relationships with building setbacks, street proportions, pedestrian spaces, and architectural scale. Excessive brightness, glare, light trespass, exposed infrastructure, and repetitive lighting arrangements affected visual comfort and reduced architectural distinctiveness. Façade lighting also showed irregular fixture placement, excessive brightness, and insufficient coordination with architectural elements. The technical assessment further identified significant energy use concerns associated with high-wattage decorative lighting and extended operating periods. Although institutional mechanisms for monitoring and maintenance are emerging, stronger coordination between lighting design, spatial planning, architectural control, and energy management is required. The study concludes that the main challenge is not the provision of urban illumination itself, but its limited integration with urban spatial structure, architectural character, public space quality, and energy sustainability. It recommends a corridor-based lighting master plan, stronger control of pole height and setback, context-responsive façade lighting, improved shielding and glare control, energy-efficient and adaptive lighting systems, and coordinated institutional management to support a more integrated, spatially responsive, architecturally sensitive, and energy-sustainable urban lighting strategy in Addis Ababa.
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Urban illumination, City beautification, Spatial quality, Architectural expression, Façade lighting, Street lighting, Energy sustainability, Addis Ababa