Visual comfort in office work, temporal factor in glare evaluation

Abstract

In order to achieve the benefits of daylight to illuminate work spaces, the daylight blocking should be avoided by the potential risk of glare. To achieve an adequate characterization of glare, it is important to consider the perception of the exposure time of the source in the field of vision (Aspect not included in the glare models). In order to determine how this perceptual aspect influences the glare sensation, two scenarios with two types of sunspots on the workplace were evaluated: 1) with greater depth of direct light income and more time in the field of view, 2) with less depth of entry and less time in the field of view. Behavioral parameters, subjective surveys (GSV) and photometric variables (DGP, EV and LR) were measured. The EV was the main explanatory variable (rho = 0.51). Also it was observed a greater tolerance to glare due to the transitory effect of the source.