Author's Name:	Nkeleme Emmanuel Ifeanyichukwu, Anosike kelechi Evan, Sani Abdulrahman Tolani, Mohammed Umar Faruq & Muhammad Abdulqadir Kabir
Subject Area:	Science and Engineering
Subject	Other
Section	Research Paper

Energy, CFL lamps, LED lamps, Dialux lighting, Design

Environmental and occupancy changes in a building increase the complexity of control operations. Occupants not only impose control goals related to thermal comfort, visual comfort or indoor air quality but also influence the building processes affecting indirectly on the control functions of the different processes. Lighting in office buildings can account for approximately 30% of electrical use. This provides an opportunity for energy efficient technologies to be implemented to reduce this load. LED lamps are part of a growing industry, based on complex electronics and careful placing of light sensors. In an economy that is accepting the need for energy saving due to the realization of limited fossil fuels, it is important to maintain and enhance energy efficient systems. Research highlighted that previous studies would either use physical measuring approach, computer based software or an occupant survey to understand how well automated daylight control systems are working. This research combined all of these approaches to quantify how much energy automated daylight control systems are saving while ensuring that occupant satisfaction and comfort is maintained. CIBSE guide states that the average standard illuminance level for a seminar room is 300 lx, what is obtainable (base case) is 248 lx, which is below the standard illuminance required for proper function of the built space. Therefore, the strategy employed was first to change the lamps used in the seminar room, this gave an output of 306 lx which is above the optimum but not too much to cause glare.