[Investigation on the lighting conditions in school-room].

Lighting conditions of eight schoolrooms were investigated in order to obtain the appropriate lighting standards for schoolroom. The following results were obtained. 1) Lighting standards, which are applicable to schoolroom, were proposed by introducing a partial modification of Moon and Spencer's standards. 2) Generally, the values of delos, which is introduced by Moon and Spencer, were insufficient: and the distribution of illumination in the school rooms was not uniform excepting the case of artificial lighting. 3) Helios distribution was also not uniform in about half the schoolrooms. 4) Annoying glare due to specular reflection of black board was observed, in about 2/3 of the schoolrooms.