In most commercial buildings emergency lighting is a legal requirement. However, they are not exclusive to business premises as there are other buildings where escape lighting must be installed. Where they are installed, the main objective of the lights will be to provide sufficient illumination for the occupants to leave the building. If it is preferred, they will switch on automatically at any time there is electrical power failure. Emergency bulkhead lights with legends and other exit luminaires are there to assist in the event of a fire and will also help during power cuts and similar emergencies. (continued below)
There are various emergency luminaires and each one has been carefully designed. They have individual features that have been fashioned to fulfil the requirements of the installer. Every application has it own special needs and this collection should provide for every eventuality. There are bulkheads, exit sign boxes, hanging blades and twin halogen spots. The luminaires can be positioned on walls and ceilings, where they will direct staff and members of the public to safety.
Emergency luminaries have integral battery packs that will usually sustain light output for three hours after mains electrical failure. Batteries have to be tested regularly, so it is necessary to simulate mains failure to assess their performance. Battery discharge tests are usually carried out at the weekend or at other times when the premises are closed. The emergency lighting circuit must have all the facilities for a test to be carried out and the results should be registered in a log. Regular testing and servicing is an essential process to ensure the emergency lights remain in full working order.