What is an explosion proof high bay led light or low bay light？

An explosion proof high bay light fixture or low bay light is an industrial-grade light fixture designed for use in hazardous locations where atmospheres may be exposed to the release of flammable gases or vapors, combustible dusts or ignitable fibers or flyings in explosive concentrations. Typical hazardous environments form in high bay and low bay facilities such as oil and gas processing facilities, petroleum refineries, chemical plants, solvent extraction plants, powdering and lacquering facilities, saw mills and wood-processing facilities, pulp and paper mills, ammunition and fireworks manufacturing and storage facilities, flour silos, grain processing and storage terminals, coal preparation and processing plants, aircraft hangers and fuel servicing areas, pulverized sugar and cocoa packaging and handling plants, and confectionary manufacturing plants.

Explosion proof high bay lights are built to operate safely in these environments. These explosion proof high bay lights are designed in a way that they will never constitute a source of ignition of the surrounding hazardous gas or vapor while standing up to the demanding conditions faced in industrial environments.