Abstract
Light, apart from making it possible for one to view objects clearly, can also be used for the beautification of any given space. Existing 1000 Seat Lecture Theatre auditorium lights lux level (115 lux) is below acceptable of for an auditorium suitable for writing during examination. This paper focus on illumination evaluation of a lecture theatre, case study of 1000 Seat lecture theatre, Federal University of Technology, Akure, Nigeria. The auditorium is used for lecture and writing examination. Lumen method which is one of the methods for calculation the number of lamp for a space is used to determine the number of lamp needed for the studied area. The architectural design of the auditorium is not available, so, the dimensions of the floor of the studied area were measured with a measuring tape. The measured floor dimensions was used to produce model of the floor in autoCAD software in order to calculate the area of the floor because the auditorium was of irregular shape and different mounting heights. The obtained area is used to calculate the illuminance required for the auditorium using Lumen method, equation. Try and error method was used in selecting E, Mf and Uf to arrive at 115Lux of the studied area. Lumen method, putting into consideration standard maintenance factor (0.8) and utilization factor (0.7) of existing literatures and renowned consultancy firms were used. This paper submitted that the lux level of the 1000 Seat Lecture Theatre (SLT) is below acceptable international standard of 400lux (standard and the industrial practice) for a classroom-auditorium suitable for writing examination. The space is poorly illuminated (33.3% of the required illumination and 20% wattage contribution of the design.) using EDA 18W compact fluorescent lamp (CFL). The existing 2 x 18W CFL installed in the SLT should be replaced with 85W (5500lumen, 5500K, 10000Hrs) CFL because of its benefits. 400 Lux is adequate for Lecture Theatre Auditorium lux level; lighting designer should employ adequate lux level to avoid negative side effects of poor illumination.
Highlights
The iris regulates itself to avoid damage if an excessive amount of light falls on it, the need for proper illumination to avoid damage to the eyes
Poor lighting has always been the problem of many spaces, just as we have in the 1000 Seat Lecture Theatre (SLT)
Where N is the number of luminaires; n is the number of luminaires per lamp (n=1); E is the illuminance; A is the area in square meter; Utilization Factor (Uf) is the utilization factor; Maintenance factor (Mf) is the maintenance factor and L is the lumen output of the lamp
Summary
The iris regulates itself to avoid damage if an excessive amount of light falls on it, the need for proper illumination to avoid damage to the eyes. The lighting designer will consider design consideration and other matters which include purpose of installation, external influences which may affect it, budget of the client and its maintainability These essentialities are lacking in 1000 SLT and as a result of these, internal lighting design evaluation is necessary to perform a required task in the auditorium under study like examination and the use of the auditorium as an event canter during the day and night or cloudy days. This leads to determination of adequacy of the existing illumination of the1000 Seat Lecture theatre by calculate the number of luminaires which will meet the required illumination, compare the existing illumination with the required standard. Risk on site and reduce safety cost; 400 Lux is adequate for Lecture Theatre Auditorium lights lux level; lighting designer should employ adequate lux level to avoid negative side effect of poor illumination
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
