We conducted psychological evaluation experiments on preference for the color temperature by using a laboratory whose air temperature was regulated at a constant value. The experiments demonstrated that the air temperature to which the subjects were exposed was low, as in winter, a low color temperature was preferred. On the other hand, the air temperature was high, as in summer, a high color temperature was preferred. Accordingly, it is strongly expected that the color temperature preference for general lighting varies depending on the air temperature in the room.
