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Key Factors Dictating Excessive Lighting Energy Consumption In Schools: A Post-Occupancy Analysis, Roderic Bunn, Peter Raynham

SDAR* Journal of Sustainable Design & Applied Research

Good practice in lighting energy consumption in schools is regarded to be around 13 kWh/m2 per annum (CIBSE LG5, 2011). However, recent post-occupancy evaluations reveal lighting energy consumption in schools to be above 30kWh/m2 p.a., despite the use of energy efficient lamps, switching based on infrared presence/absence detection, and digital controls for daylight-linked dimming. To identify causes of excess energy consumption for lighting, this study undertook detailed post-occupancy field measurements of the lighting consumption of two recently-completed K schools – a small primary and a large secondary – equipped with digitally-addressable lighting interface (DALI) systems. Instrumentation of individual light fittings …