• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.25 no.4
• /
• pp.24-29
• /
• 2011

When an emergency light turns on due to a blackout, the intensity of illumination is drastically changed from hundreds [1x] to 1.0[1x]. This sharp change of illumination intensity not only lowers the darkness adaptation of the eye, it also degrades the obstacle cognitive ability of the evacuees, resulting in secondary critical accidents due to anxiety, and fear. Thus, this study proposed a convertible emergency lighting fixture that controls the rate of speed of light in two stages by time with darkness adaptation of the eye in consideration. In addition, the effect of such emergency light is verified by suggesting an illumination simulation without increasing the number of light or capacity of battery to make it economically feasible.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
• /
• 2009.10a
• /
• pp.145-148
• /
• 2009

It is sharply decreasing from several hundred[lx] to 1.0[lx] when it turn on the emergency lamps. The sharply decreasing illuminance makes peoples to have dark adaptation for long time. And they were with fear and confused. It also causes secondary accidents by people who take a mistake. This paper studied the combination style emergency lighting fixture to improve a problem of dark adaptations. But it was made an assumption that same conditions of battery capacity and a number of emergency lamps.