Short answer: This area is very important for buildings with hazardous workplaces where, after a mains power failure, minimum lighting must be provided so that critical work processes can be completed: removal of biological and chemical agents, explosive or flammable materials, or otherwise bringing work processes to a safe conclusion. It is also important in medical locations.
This area is very important for buildings with hazardous workplaces where, after a mains power failure, minimum lighting must be provided so that critical work processes can be completed: removal of biological and chemical agents, explosive or flammable materials, or otherwise bringing work processes to a safe conclusion. It is also important in medical locations.