What type of lighting is recommended for work in confined spaces or sewers?

The recommended choice for lighting in confined spaces or sewers is explosion-proof lighting. This type of lighting is specifically designed to prevent the ignition of flammable gases, vapors, or dust that may exist in such environments. When working in confined spaces, where there is a risk of explosive atmospheres, it is crucial to use lighting that enhances safety. Explosion-proof lights are built to contain any potential explosion within the fixture, ensuring that they do not pose a risk to workers or the environment.

Moreover, mirrors to direct sunlight are generally not feasible in confined spaces or sewers because these areas are often underground or enclosed, where natural light cannot penetrate. Ordinary electric lights may not be suitable either, as they could potentially lead to unsafe conditions, especially if not rated for hazardous locations. Using propane, gas, or kerosene lanterns is also dangerous in confined spaces due to the risk of fire or toxic fumes. Special matches would not provide adequate illumination for work tasks. Therefore, the use of explosion-proof lighting is the only option that addresses both safety and functionality in these challenging environments.