ISU for Sustainability

Embracing SDGs towards Quality Education and Academic Experience in the Countryside

Research | SDG 7 – Affordable and Clean Energy

Technical Research Category

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Bondee L. Peñaflor


This study aimed to assess the lighting systems in the selected buildings of Isabela State University, Cabagan Campus which will serve as basis in determining intervention potentials and energy saving opportunities. Two biggest electricity-consuming buildings were considered in this research: Campus Administration Building (CAB) and College of Education Building (CEB). Using infrared distance meter, light meter and a self-prepared Lighting Assessment Data Sheet, the level of illuminance was measured in each room/office. Results show that the total electricity consumptions per day are 2.73KW and 1.049KW for CAB and CEB, respectively, and the costs per day are PhP2,989.16 and PhP114.57, respectively. The shift into 10W LED Pin Lights as replacement to the existing non-LED lighting fixtures would make total electricity consumptions per day at 1.11KW and 0.75KW, respectively while the cost would result into PhP121.23 and PhP81.91. A potential annual saving of PhP46,709.1 in CAB while PhP8,621 in CEB. Meanwhile, Only the Cashier’s Office at CAB was found to have sufficient illumination while all the rest are under lit. When the window blinds are rolled-up, the Conference Room and the Registrar’s Office are still under lit while the Executive Officer’s Office, Human Resource Management Office, MIS Office, Planning Office and the Cashier's Office are over lit. In CEB, the mean illumination levels of the offices/rooms are under lit wherein the levels are way below the standard. It is recommended that all non-LED type lamps should be replaced with LED-type. The design of lighting system should be revisited and the use of LED-type lamps should be considered in the Conference Room and the Registrar’s Office including those rooms/offices in CEB.

Keywords: Energy Audit, Lighting System, Illuminance, LED-type Lamps