What is an Explosion Proof Light?

Explosion proof lighting or hazardous location luminaires are used under environment where flammable gases or combustible dusts exist. These specialized lights must be tested and approved by strict regulations in different regions. 

Explosion-proof lights are designed to be used in a "Hazardous Location," broadly speaking, a hazardous location is an area where there are high enough concentrations of combustible materials in the air to cause a fire or explosion. This could be in the form of a gas (e.g. natural gas, ethanol, toluene, etc), a dust (e.g. grain, flour, coal, etc), or even a fibre. When these hazards are present, workers need to (by law) use specially designed equipment to reduce the risk of igniting the flammable materials lest they cause a catastrophic fire or explosion.