Emergency Lighting
the manufacturer By Giles Lillistone – Technical & Quality Manager at GreenBrook Electrical
W
ith the revision of BS 5266 Emergency lighting – Part 1; the way we must approach
emergency lighting as an industry has changed. The standard is now much more complex, and although it is more detailed with regard to emergency safety lighting and standby lighting, there is potential for misunderstandings between the parties responsible for the design and installation of these fittings. Every commercial building has a specific
requirement for emergency lighting, the role of which is to take over from the normal lighting provision in the event of a power failure, to aid the evacuation of people, to highlight areas showing emergency equipment and to illuminate the external areas leading to places of safety. In general, lighting requirements will vary depending on usage, size, layout and defined escape routes. Rooms without the benefit of
22 | electrical wholesalerAugust 2019
daylight must always have lighting provided. Similarly, if a building is occupied at night, there should be emergency lighting installed in all areas.
Understanding the tasks at hand Emergency lighting is a general term and is subdivided into 'emergency escape lighting', ‘emergency safety lighting’ and 'standby lighting'. For emergency escape lighting, it is worth noting that the lighting system has to cover all escape routes to the place of safety which may be in the immediate vicinity or located away from the building. These areas must be adequately lit by the emergency lighting system or by a different, independent power supply. Emergency safety lighting applies to buildings
where a staged evacuation plan is implemented during power failure. Emergency safety lighting is adequate to allow occupants to stay in an area of the building during a power failure, but is not
Emergency Lighting Specification – the role of the contractor and
enough for functional tasks to continue. Standby lighting is required in buildings where
functional tasks must continue during power failure. This needs to be 100% of the normal lighting. The difference between these is that whilst emergency lighting forms part of the fire protection of a building, standby lighting does not.
Responsibilities of the Lighting Designer and the Luminaire Manufacturer Choosing LED luminaires means that the lighting design is much more equipment specific and requires the designer looking more carefully into the photometric qualities of the fitting and the testing undertaken by manufacturer. Gone are the days that you could expect that most manufacturers’ 8w bulkheads would give the same output. Typical emergency LED luminaires do not
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