LED Emegency lights refers to battery-backed or otherwise independently powered light sources that are designed to activate when a power outage creates low-visibility conditions in a workplace.
The use of LED emergency lighting is a mandatory requirement of modern commercial and residential building codes. Many building codes also require the installation of emergency lighting as a retrofit for older building.
In the United States, OSHA recognizes the National Fire Protection Association Life Safety Code (101) standards for emergency lighting as providing instructions for how employers can meet their general duty requirements for ensuring a safe workplace. These standards require that all exit routes, including aisles, corridors, and the like, have emergency lighting.
OSHA standard 1910.34 describes an exit route as a “continuous and unobstructed path of exit travel from any point within a workplace to a place of safety (including refuge areas).” In the event of an outage, emergency lighting must activate automatically during a power failure and must be able to last for at least 90 minutes. OSHA and NFPA codes also prescribe regular maintenance and testing of emergency lighting requirements, including a monthly inspection and annual test per NFPA 101, to ensure that they remain in proper working order.
Emergency lighting codes also specify that exit signs must remain illuminated in the case of a power failure, either by external emergency lighting or by an emergency light source that is intrinsic to the sign itself. In some cases, this lighting may be provided by non-battery sources such as photoluminescence (glow in the dark).
Emergency lighting in workplaces is a topic for which standards from numerous non-occupational regulatory agencies must be taken into consideration. In addition to NFPA codes, there are local building codes, the International Building Code, and International Fire Code standards that should be accounted for by the persons responsible for ensuring safety in their workplace.
In the UK, the current law demands that all occupied buildings be fitted with adequate escape lighting to allow safe exit in the case of a mains power failure.
According to the Fire Precautions Regulations 1997 & BS5266 Part 1 for the workplace, building owners must have in place luminaries to aid successful escape throughout the entirety of an emergency exit. Furthermore, owners are also required to test their emergency lighting systems frequently and conduct regular maintenance checks to ensure that the emergency systems are always in good working order. An LED indicator within the lighting source shows the charge of the internal batteries. The LED will shine green if the battery is fully charged, although some older models may display a red LED. Regardless, the units should be tested regularly.