The Influence of Daylight and Artificial Lighting in the Morning on Ease of Activities and Spatial Evaluations in Living Room

Daylight is natural energy used most easily in the home, and its effective use contributes to energy conservation. Therefore, the indoor environment in the morning was chosen in this research as a condition in order effectively to obtain daylight and the artificial lighting is done as a condition in order effectively to promote energy conservation. The purpose of this research is to examine the influence of illuminance by daylight that changes in time in evening and morning on the necessity of the artificial lighting and the evaluation of the atmosphere in the room. The experiment was done using a pseudo-daylight device. It has been understood that the different illuminance with the artificial lighting influences the brightness evaluation and the amount of artificial lighting felt to be necessary, and the brighter the general lighting in the room is, the higher the illuminance level at which the subject doesn't feel the need for the artificial lighting is as the amount of daylight is increasing.