| Abstrak/Abstract |
Research on how to optimize natural lighting can recommend ways to save the energy without ignore the
occupants’ visual comfort. This paper discusses the feasibility as workplace of the office workspace providing sufficient
natural lighting and how the occupants respond to that environment. The research is conducted with computer simulation
using DIALux software and field measurement at three different times of day: 8.00, 12.00 and 16.00. The research object
is an office room of Magister Teknik Sistem (METSI), Universitas Gadjah Mada, Yogyakarta. It is measured and
simulated in two window conditions; (i) without vertical blinds and (ii) with closed vertical blinds. The measurement and
simulation show that the highest average of illuminance level is 305 lx and the highest daylight factor is 1.135%. This
level is reached at the 12.00 with windows without blinds. The result is below the standard which are 350 lx for
illuminance level and 2% for daylight factor. Therefore, it can be concluded that the natural lighting of the research
object/ room has failed to meet the requirement needed for an acceptable workplace. Nevertheless, the occupants
passively adjust the vertical blinds’ position in order to create their visual comfort. The occupants initiated adaptive
activity, such as moving (from their sitting position) to where there is abundant light or turning on the artificial lighting
when the room is dark. |
