HUMAN VISUAL RESPONSE TO OFFICE LIGHTING THROUGHOUT THE DAY

摘要

A psychophysical experiment was carried out to investigate visual response in a lit environment. During the experiment, the illuminance level will vary at different times of a day. Five colour-normal observers (2 males and 3 females), between 22 and 29 years of age, participated in the study. They were asked to assess the room in terms of 5 scales, liking, comfort, excitation, safety, and brightness, using a 6-point forced-choice categorical judgement scaling method. The experimental results show that the scale value tends to decrease in the morning until midday and tends to increase in the afternoon. Based on evaluation results obtained at each timeslot, high correlation was found between brightness and safety at the start of timeslot. For the end of timeslot, the perceived brightness is highly correlated with liking rather than safety.