The explosion-proof structure type of explosion-proof lamps should be determined based on the level and scope of the explosive gas environment. For example, explosion-proof lamps must be used within Zone 1; Fixed lighting fixtures in Zone 2 can adopt explosion-proof and increased safety types, while mobile lighting fixtures must adopt explosion-proof types. The level or group of selected explosion-proof lamps should not be lower than the level and group of explosive mixtures in explosive hazardous environments. At the same time, the impact of the environment on explosion-proof lamps should be considered, and various environmental requirements such as environmental temperature, air humidity, corrosive or polluting substances should be met. Choose the protection level and anti-corrosion level of lighting fixtures according to different environmental requirements. Especially when corrosive gases are present in explosive gas environments, it is crucial to choose lighting fixtures with corresponding anti-corrosion performance.

In petrochemical enterprises, explosion-proof lighting fixtures are mainly used in explosive hazardous areas. With the widespread application of increased safety electrical equipment in explosive hazardous areas in Zone 2, increased safety and composite lighting fixtures are also increasingly being used. On the basis of having certain explosion-proof performance, increased safety lamps have advantages such as light weight, low price, easy installation and maintenance, and long service life compared to explosion-proof lamps. The commonly used composite electrical equipment in petrochemical enterprises is the increased safety explosion-proof composite electrical equipment, which is generally composed of explosion-proof components, increased safety wiring terminals, and increased safety shells. It has both the safety performance of the explosion-proof type and the advantages of the increased safety type.