An emergency light is a lighting device with a battery backup that switches on automatically when a building experiences a power outage. Emergency lights are standard in commercial and high occupancy residential buildings, such as college dormitories. Most building codes require emergency lighting be installed in older buildings as well.
Hazardous location exit signs and emergency lights are designed to operate in hostile environments that would damage ordinary signs and lights. Constructed from corrosion resistant materials, some units offer sealed enclosures that can be used in outdoor environments or areas subject to water spray, moisture and extreme temperature conditions.
Remote heads are lights used in conjunction with a remote capable emergency lights or exit sign. Essentially, remote emergency light heads offer more than one backup lighting location, without having to add additional lighting systems. The result is a flexible system with low cost and maintenance.