Modern buildings are becoming taller, with larger floor spaces and more advanced internal facilities. Their functions are increasingly diverse, and the materials and equipment 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, or earthquakes. In such situations, the regular power supply may fail or be intentionally 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 emergency responses, it is essential to activate emergency lighting immediately. This not only helps prevent further damage but also ensures that critical systems remain functional during crises. Proper emergency lighting is therefore a vital component of modern building design and disaster preparedness. Heilongjiang Junhe Building Materials Technology Co., Ltd , https://www.junhejiancai.com