Emergency lighting is crucial for when you need to evacuate a building quickly and safely. Light fittings for emergency lighting include a battery as an alternative power source and is continuously charged and usable. During an emergency event, such as a fire breaking out or a power failure, the emergency lights will kick in immediately and use the backup battery to power the lights. During a crisis the emergency lighting must be able to function effectively for a minimum of three hours on battery power. This is why emergency lighting output is reduced in most cases to just 10% of normal light emission to conserve power.
A maintained emergency light fitting will operate as a normal light and be controlled with the other lights in the same area. However, when an incident happens that causes the mains power to fail, the maintained emergency light fitting will continue to operate but, at a lower light level.
Usually a non-maintained fitting is switched off, but its battery will be continuously charged with a green LED indicator light showing that it is fully charged. When a crisis occurs and the power fails, then the fitting will switch on using its own battery supply. Non-maintained fittings are not part of the general lighting in your premises but are usually recognisable fittings such as emergency exit signs. If you are unsure about which type of emergency lighting you should install, then please contact us and we will be happy to offer our expert advice and guidance.