Emergency Exit Class 1 Div 1 Lights are the highest rating of hazardous location lighting available. These rugged lights are certified and tested under UL certification UL844. Emergency Exit Class 1 Div 1 Lights work in dangerous, hazardous locations where concentrations of flammable combustible vapors, flammable gases, or liquids are always present. If you are unsure what light might work best for you, contact the lighting experts at LED Lighting Supply. We also offer free lighting plans so you can see how well our lights will work for you before you buy.