Modern buildings are becoming taller, with larger floor spaces and more advanced internal facilities. Their functions are increasingly diverse, and the equipment and materials used are constantly evolving. The internal movement within these structures—both horizontal and vertical—is also growing in complexity. These buildings, including their underground sections, require a continuous and reliable power supply. However, various types of disasters can occur, such as fires, explosions, and earthquakes. In such situations, the regular power supply may fail or be deliberately cut off, leading to a complete loss of normal lighting. To ensure the safety of people and property, and to allow for timely operations and responses during emergencies, emergency lighting must be activated immediately. This not only helps prevent further damage but also ensures that critical systems remain functional during crises. Properly designed emergency lighting is essential for maintaining order, guiding evacuations, and supporting rescue efforts in times of need. Heilongjiang Junhe Building Materials Technology Co., Ltd , https://www.junhejiancai.com