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Types of emergency lights: Portable emergency lights, fire emergency lights, energy-saving emergency lights, underwater emergency lights, rechargeable emergency lights, solar-powered emergency lights, multi-functional emergency lights, DC fan DC-001 emergency light, HX-628B rechargeable emergency light, HX-618C type emergency light, HX-628D type rechargeable emergency light. Use of fire emergency lights: Fire emergency lighting systems. Summary: Fire emergency lighting systems mainly include emergency lighting for accidents, as well as signs and indicators for emergency exits. They are designed to guide trapped people to evacuate or to facilitate firefighting and rescue operations when the normal lighting supply is interrupted in the event of a fire. However, routine inspections have revealed that the organization has many issues regarding the selection, installation, and use of fire emergency lighting fixtures. Therefore, the proper selection of the power supply control method and wiring method for emergency lighting systems, along with proper routine maintenance, directly affects the effectiveness of these fire emergency lighting systems. Keywords: Emergency lighting, Power supply control method, Installation and maintenance I. Rational selection of the power supply control method for emergency lighting systems At present, the emergency lighting systems in use in China are mainly of the type with an independent power source for control; the normal power supply comes from the regular lighting circuit, and this circuit is used to charge the batteries of the emergency lights. When the normal power supply is cut off, the backup power source (batteries) takes over to supply power. Each of these emergency lights contains a large number of electronic components such as transformers, voltage stabilizers, chargers, inverters, and batteries. The battery in such emergency lights needs to be charged and discharged during use, maintenance, and in case of faults. Another type is the centralized power supply and control type; the emergency lighting fixtures do not have an independent power source, and in the event of a failure in the normal lighting power supply, they are powered by a centralized power supply system. In this type of emergency lighting system, the complex electronic circuits inside all the luminaires are eliminated; the emergency lighting fixtures are no different from ordinary fixtures, and the centralized power supply system is located in a dedicated room. Compared with emergency lighting fixtures with independent control powered by their own sources, those with a centralized power supply and centralized control offer advantages such as easier centralized management, the ability for users to conduct self-inspections, facilitation of fire safety inspections, extended lifespan of the fixtures, and improved efficiency in emergency evacuations. They also feature good system reliability, a long service life, ease of maintenance and management, and low system costs. However, in emergency lighting fixtures with centralized power supply and control, since there is no backup power source (battery) within each fixture, a failure in the power supply circuit will directly affect the proper operation of the emergency lighting system; therefore, special fire protection requirements are imposed on the installation of such power supply circuits. Independent emergency lighting fixtures with built-in power sources, having a backup power source (battery) inside each fixture, do not require any special wiring; a failure in the power supply lines does not prevent the backup power source from taking over. When an emergency light fails, it generally only affects that particular light unit, with little impact on the entire system. When selecting emergency lighting fixtures, the emergency lighting system should be chosen appropriately based on the specific circumstances. Generally, for new construction projects or those equipped with fire control rooms, it is advisable to arrange the wiring uniformly during the construction process, and to use emergency lighting systems that rely on centralized power supplies and control ； For small spaces, or in cases of subsequent modifications or secondary renovations, emergency lighting with its own power source and independent control should be used. II. Issues to Consider When Wiring Emergency Lights （1）Common Wiring Methods for Emergency Lights It has been found through regular inspections that incorrect wiring methods are a common cause of emergency lighting fixtures not functioning properly. There are six common wiring methods for emergency lighting: (II) Precautions 1. It is necessary to accurately understand the characteristics of each wiring method in order to avoid making connections blindly, which would prevent the system from functioning as intended ； 2. If emergency lighting is to be used as part of the regular lighting, a three-wire controllable connection method should be employed. 3. For multi-story public buildings, if there is no fire control center, the emergency lighting fixtures in various areas can be controlled using local switches (single lamp control or multiple lamp control), or via a three-wire system with centralized control in the distribution box. 4. In projects with a fire control center, in order to ensure that the fire control center can activate the emergency lighting in the floor where the fire occurred as well as in related floors in the event of a fire, the wiring methods shown in Figures (5) and (6) should be employed. Installation and maintenance of emergency lights 1. In engineering design, to facilitate regular maintenance and management, fire emergency lighting should preferably be powered by dedicated feed circuits on a floor-by-floor basis. 2. To ensure the reliability of the power supply for fire emergency lighting, it is advisable, where possible, to use the low-voltage emergency busbar in the substation as the power source; that is, when diesel generator sets are used as emergency power sources, as long as the generators are operational, they will continue to provide power. 3. In a fire situation, there is less smoke and more oxygen near the ground; the instinctive reaction when evacuating is to bend over or crawl, so localized high-intensity lighting is more effective than the uniform lighting provided by fixtures mounted at higher heights. Therefore, low-mounted installation should be promoted, that is, providing emergency evacuation lighting near the ground or at ground level. 4. All emergency lights leave the factory in a discharged state; they must be charged for 20 hours before use before they can be discharged. 5. Emergency lighting fixtures in use should be regularly checked for their performance; every half month or month, a continuous on/off test should be conducted to verify the circuit switching function and the emergency capabilities of the batteries, and the batteries should be discharged to extend their service life. 6. Ensure proper fire protection for distribution lines; when installed concealed, they should be placed within non-combustible structures, with a protective layer thickness of no less than 30 mm ； When installed openly, metal pipes should be used, and fire-resistant coating should be applied to the outside of these pipes, or other fire prevention measures should be taken ； The wiring shall use fire-resistant cables or heat-resistant cables and wires. What is the difference between emergency lights and regular lights? Emergency lights are generally designed in a rectangular shape, with the capability to provide illumination over long distances as well as wide areas at close range. High-quality LED emergency lights are generally white in color and do not have any flickering at all, so they are good for the eyes. It is also easy to carry; it can be moved around at home or taken on outdoor trips for camping. Ordinary table lamps or rechargeable table lamps are quite common, so there’s no need to go into detail about them. Generally, they don’t have a function for shining light over long distances, and they’re not convenient to carry in emergency situations. Power source for charging emergency lights: Depending on the required power, common options include 6V4AH lead-acid batteries and 6V4.5AH batteries