A Guide to Emergency Lighting - Introduction

WHAT IS EMERGENCY LIGHTING?

Emergency lighting is lighting that automatically comes into operation when the mains power supply to the normal lighting fails.

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DO I NEED EMERGENCY LIGHTING?

Premises that would normally require emergency lighting include: shops, offices, factories, warehouses, schools, hospitals, the public (landlord) areas of residential blocks, railway stations & airport termini, carparks, leisure centres, pubs, theatres and places of worship.

 

 

 

Emergency lighting is required wherever the public has access to a building or where people are employed.

 

 

 

Premises that do not normally require emergency lighting are individual houses and the privately occupied areas (flats and maisonettes) within larger residential blocks.

 

 

Emergency lighting is not required in private residential property that does not have public access.

 

 

Because emergency lighting concerns the safety of the public and employees it is heavily regulated. Several regulations, laws and standards define when and where it is required, the light levels that must be provided and how it should be maintained and tested.

For more information, read here:

To understand the regulations related to emergency lighting: What are the regulations & standards governing emergency lighting?

To understand about the different types of emergency lighting: What are the different types of emergency lighting fixture ?

To understand the process of emergency lighting design: Emergency Lighting Design

To understand emergency lighting testing: Emergency Lighting Testing

For FAQs: Frequently Asked Questions

WHAT ARE THE REGULATIONS & STANDARDS GOVERNING EMERGENCY LIGHTING?

Below is a summary of the most important regulations and standards affecting emergency lighting.

• The Regulatory Reform (Fire Safety) Order (or RRO). This applies to England and Wales, but equivalent legislation is in place in Scotland and Northern Ireland. It is very broad in its scope.
• The RRO applies to all premises except for:
• Domestic premises
• Offshore installations
• Fields, woods or other land (provided they are away from an undertaking&#;s main premises)
• Aircraft, locomotives or rolling stock, trailers or semi-trailers used as a means of transport or a vehicle for which a licence is in force
• Mines
• Boreholes
• The RRO applies regardless of the ownership of a building, so the public sector, private sector, individuals, charities and trusts all fall within its scope.
• The RRO introduces the concept of the &#;Responsible Person&#;. In Scotland this is the &#;Duty Holder&#; and in Norther Ireland it is the &#;Appropriate Person&#;. Their responsibilities are considerable, but so far as emergency lighting is concerned they are required to ensure that:
• Emergency exits and routes are indicated by signs, and
• Emergency exits and routes requiring illumination are provided with emergency lighting of adequate intensity in the case of failure of their normal lighting.
• Emergency lighting is subject to a suitable system of maintenance

It will be clear from the above that for the &#;Responsible Person&#; to discharge their duties it is necessary that there are standards to follow concerning the design of an emergency lighting installation, the construction and performance of the emergency lighting fixtures themselves and the testing of the installation.

• Building Regulations Fire Safety Approved Document B. This document (download here )mandates the use of escape lighting in almost all buildings and situations except for private residential premises. See table 5.1 and paragraphs 5.25 &#; 5.27. This document also states that escape lighting must comply with BS -1 and that exit signs must comply with BS -4.

 

• BS -1. Emergency lighting &#; Part 1: Code of practice for the emergency lighting of premises. Some of the key provisions of BS -1 are as follows:
• Minimum lux levels for emergency lighting. BS -1 defines the minimum lux levels that should be provided as follows:
• Defined escape routes should be illuminated to a level of not less than 1 lux along their centre line at floor level.
• Open areas should be illuminated to a level of not less than 0.5 lux at floor level.
• High risk task areas should be illuminated to a level of not less than 10% of the average of the normal lighting provided at that point.
• The location of emergency light fittings should include. BS -1 advises where emergency lighting should be placed.
• Near each exit door intended to be used in an emergency
• Near stairs, so that each flight receives direct light
• Near any change in level
• Externally illuminated escape route signs and other safety signs needing illumination under emergency lighting conditions
• At each change of direction
• At each intersection of corridors
• Near each final exit to the outside of the building and to a place of safety
• Near each first aid post
• Near each piece of fire-fighting equipment and call point
• Near escape equipment provided for disabled people
• Near refuges and call points including two-way communication systems and disabled toilet alarm call positions
• Near manual release controls that release electronically locked doors
• Outside the building close to each final exit
• In toilets used by disabled people and multiple closet facilities
• All motor generator rooms, plant rooms, control rooms and switch rooms
• Pedestrian escape routes from covered and multi-storey car parks
• Emergency lighting duration. BS -1 states that emergency light fittings should be able to operate for 3 hours following a mains power failure. 1 hour is also permissible, but only if the building will be evacuated immediately in the event of a power failure and not re-occupied till the batteries have been fully recharged.
• Emergency lighting testing. BS-1 defines the testing that should be performed on an emergency lighting system as follows:
• A brief functional test at least once each month
• A full duration test at least every year
• A visual inspection at least every year
• BS -1 also advises that records of all tests and repairs should be kept in a log book.
• BS -4. Code of practice for escape route signing. This standard gives recommendations for the selection and use of escape route signs conforming to ISO. Some of the key provisions of BS -4 include:
• Signage design. BS -4 mandates the use of legends and directional arrows, all defined in BS EN ISO . These are widely known as ISO legends and are easily distinguished by their use of an image of a man running through a door. BS -4: also mandates the use of supplementary text, such as &#;Exit&#; or &#;Fire exit&#; alongside the legend and arrow. However, the EC safety signs directive (92/58/EC) adopted a pictogram-only approach (no text). For a summary of the signage designs that are currently approved for use in the UK 
• Please check &#;What type/style of emergency exit sign are allowed in the UK?&#; 
• Signage location. BS -4 advises where signs should be located and the principles that should be adopted to ensure that they are appropriately sited.
• Signage mounting heights. BS -4 advises that signs should be mounted consistently and conspicuously and recommends specific mounting heights that should be adopted wherever practical.
• Use of directional arrows. BS -4 makes it clear that &#;straight ahead&#; is to be indicated with an up-arrow.
• Sign size and viewing distance. BS -4 defines the maximum viewing distance for an illuminated sign based on its luminance measured in cd/m². When NVC Lighting states the maximum viewing distance of an illuminated emergency exit sign it is in relation to BS -4.
• BS -4 makes frequent reference to other standards. In particular, BS -4 refers to:
• BS -1 for the inspection, testing and maintenance of exit signs
• BS EN -2-22 for all constructional aspects of emergency lighting signage
• BS ISO -1, -3, -4 for detailed aspects of signage design such as colours, graphics and text

WHAT ARE THE DIFFERENT TYPES OF EMERGENCY LIGHTING FIXTURE?

Emergency lighting fixtures can be classified in at least two ways:

• How it works
• Self-contained
• Maintained & non-maintained
• Central battery
• Maintained & non-maintained
• Its function
• Escape lighting
• Open area & signage
• Standby lighting
• High risk task lighting

Classified according to how they work there are two main types of emergency lighting fixture:

• Self-contained emergency lighting fixtures have their own re-chargeable batteries and an associated re-charging circuit built in. When mains power fails the batteries automatically provide the power required to operate the fixture. Because it is necessary for the batteries to be kept at or near to a 100% fully-charged state it is mandatory that self-contained emergency lighting fixtures are connected to a permanent (un-switched) live supply .
• Please check  How should emergency lighting be tested and wired? . Self-contained emergency lighting fixtures account for about 80% of the UK emergency lighting market and are suitable for many types and sizes of building.

 

 

A typical emergency conversion kit. This is used to convert a normal mains powered light fitting, such as an LED panel, into an LED panel that will function as a self-contained emergency fitting if there is a power failure.

The plastic enclosure contains the necessary electronics and the batteries to power the fitting for 3 hours.

 

 

 

• Central battery emergency lighting fittings are connected, via special fire-resistant cable, to a central battery that will deliver the required power when mains power fails. Central battery systems account for about 20% of the UK emergency lighting market and are mostly confined to large buildings and estates such as office blocks, campuses and hospitals.

Both self-contained and central battery emergency lighting can be &#;maintained&#; or &#;non-maintained.&#;

What is Maintained and Non-maintained in Relation to Emergency Lighting?

• A maintained emergency lighting fixture works as a normal lighting fixture when mains power is available and remains illuminated (usually at a reduced output level) using battery power when mains power fails. Typical examples of maintained emergency light fittings would include:
• LED panel and LED downlight conversions. These fittings are widely used in offices, classrooms and corridors. In a typical installation 1 in every 5-10 panels or downlights would be a maintained emergency conversion. This means that it is a standard panel or downlight to which an emergency conversion pack has been added, so that it looks and operates as a standard fitting but remains on (usually at a reduced output level) when mains power fails.

 

A typical LED panel. When installed along with the emergency conversion kit (pictured above) this becomes a maintained emergency light fitting.

When mains power is available it can be switched on and off as normal, but if mains power fails it automatically switches on at a reduced output level using its batteries, and can remain illuminated for at least 3 hours.

The plastic enclosure contains the necessary electronics and the batteries to power the fitting for 3 hours.

 

 

 

• Exit signs. These are often installed as maintained fittings, so that they are fully illuminated when mains power is available, and remain illuminated using battery power when mains power fails.

 

 

A typical exit sign. These are often installed to operate as maintained fittings, so they are on when mains power is available and remain on (using their battery power) if mains power fails.

 

 

 

• A non-maintained emergency lighting fixture is off when mains power is available and switches on, using battery power, when the mains power fails. Typical examples of a non-maintained fittings include:
• LED bulkheads. These are popular along escape routes and over doorways and are most often installed as non-maintained fittings. They illuminate only when mains power fails.
• LED twinspots. These are widely used in industrial and warehouse premises. They are almost always installed as non-maintained fittings that illuminate only when mains power fails.

 

 

 

 

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Typical bulkhead and twinspot emergency light fittings. These are almost always installed as non-maintained fittings, so they only illuminate when there is a power failure.

 

 

 

 

 

 

 

Classified according to their function there are three main types of emergency lighting:

• Escape lighting. This is lighting whose function is to enable people to leave a building safely in the event of a power failure. Because of its importance to the safety of people in buildings escape lighting is closely regulated. Escape lighting can be subdivided into two types:
• Open area emergency lighting. The function of open area emergency lighting is to provide sufficient light to minimize the risk of panic and to enable the occupants of a building to reach and proceed along an escape route. Open area emergency lighting will typically be used throughout a building, both, for example, in a classroom or office and along a corridor or designated escape route.
• Emergency signage. The function of emergency signage is to show where an escape route is and to guide people along it by indicating changes of direction, for example, at the junction of two corridors or at the top of a flight of stairs.
• Standby lighting. This is lighting whose function is to enable existing tasks or activities to proceed uninterrupted by a power failure. For example, the lighting in a hospital operating theatre, a police incident room or the control centre in a power station would be equipped with standby lighting. Standby lighting is not a legal requirement and if it is needed or not will depend on the activities being carried out and the decisions of the building owners or occupiers.
• High risk task lighting. This is lighting whose function is to illuminate an area where a potentially hazardous task is being carried out for sufficiently long after a mains power failure for the task to be made safe prior to evacuation.

Back to Technical Support

Introduction to Emergency Lighting

Emergency lighting legislation

The Regulatory Reform (Fire Safety) Order (RRFSO) , which came into force in October , charges the responsible person in control of non-domestic premises and the common areas of a House in Multiple Occupancy (HMO) with the safety of everyone in the building, whether working, visiting or living there. This duty of care includes the provision of emergency lighting. Article 14 (2) (h) of the RRFSO states:

"Emergency routes and exits requiring illumination must be provided with emergency lighting of adequate intensity in the case of failure of their normal lighting".

Emergency lighting is part of the fire safety provision of a building and cannot be ignored: as noted by the Industry Committee for Emergency Lighting (ICEL), which is the foremost UK authority on emergency lighting and provides third party accreditation for components and products for emergency light fittings under the auspices of the Lighting Industry Association (LIA):

"The legal requirement is that non-domestic buildings must be safe at all times, even if mains power failure occurs. Therefore, nearly all such buildings must have emergency lighting fitted".

The responsible person

The umbrella standard for emergency lighting is BS -1 (Code of practice for emergency lighting). The British Standards Institution (BSi) guide to this code describes the duties of the "responsible person" as follows:

"The responsible person has to be able to demonstrate that the hardware of fire safety systems and their maintenance are adequate to protect the occupants. Fire protection products and related services should be fit for their purpose and properly installed and maintained in accordance with the manufacturer's instructions or the relevant British Standard." (A Guide to Emergency Lighting Second Edition, , p 211)

Even though this duty of care can in practice often be shared or delegated, it remains a daunting prospect for lay people who have no knowledge of fire safety and find themselves in the position of being legally accountable for the protection and well being of others in this regard.

The responsible person can be anyone who has some control over a building or areas within it, including inter alia facilities management companies, landlords and lettings agents.

Emergency lighting systems: what is involved?

Following the fire risk assessment (FRA), which will surface the various issues that have to be addressed, the procedure in respect of emergency lighting will be:

• Planning and design of the system
• Positioning of emergency lighting luminaires (wall / ceiling mounted lights and signs)
• Permanent installation of all fittings
• Periodic testing / maintenance of the system

Every building will have its own specific requirements in respect of emergency escape illumination, the role of which, as noted above, is to take over from the normal lighting provision in the event of a power or circuit failure. Of course, these levels of 'normal' lighting will vary, even within an individual building. Different areas inside will have different levels of natural illumination: for example, rooms with external windows have the benefit of daylight, while unglazed, internal areas such as corridors and stairwells must always have lighting provided.

If a building is occupied at night, there must usually be provision for emergency lighting in all areas, including those that are naturally lit during the day. One exception may be in the case of 'borrowed' light from external street lamps (switched on during the hours of occupancy of the premises): if this is a reliable source of lighting and reaches sufficiently inside the building to illuminate the escape routes, it can sometimes be considered sufficient, depending on who will be using them. As noted by the HM Government Fire safety risk assessment: large places of assembly (May , p 28): "Exceptionally, in the parts of the premises used by staff and where the escape routes are simple and straightforward, borrowed lighting, e.g. from street lamps where they illuminate escape routes, may be acceptable". In other words, people who are familiar with the building may be able to evacuate safely in the hours of darkness by borrowed light; it is never acceptable practice, however, for members of the public to use escape routes that are only illuminated by such means. Emergency lighting must always be provided in this case.

What is emergency lighting?

The BSi guide to emergency lighting, referenced above, explains that:

"For the purposes of the British and European standard BS EN , 'emergency lighting' is the generic term for equipment that provides illumination in the event of failure of supply to the normal lighting" (p. 1). There are two main types of emergency lighting: (i) emergency escape lighting; (ii) standby lighting (p. 2).

Emergency escape lighting is defined as "that part of emergency lighting that is provided to enable safe exit in the event of failure of the normal supply".

Standby lighting is defined as "that part of the emergency lighting provided to enable normal activities to continue in the event of failure of the normal mains supply".

The guide further offers this important distinction between emergency escape lighting and standby lighting: while the former constitutes part of the fire protection of a building, the latter does not (unless it meets the same equipment design and installation requirements as emergency escape lighting systems). As such, from the point of view of fire safety provision, emergency escape lighting is the significant type of emergency lighting, and will be the focus of the remainder of this article.

Emergency escape lighting

There are three main aspects of emergency escape lighting: 1) escape route lighting; 2) open area / anti-panic area lighting; 3) high risk task area lighting.

1. Escape route lighting is the part of an emergency lighting system provided to enable the swift and safe evacuation of a building by illuminating its escape routes, such as corridors and stairways, and also the location of fire-fighting equipment, e.g. fire extinguishers and safety / security equipment such as keyboxes holding emergency keys to exit doors. As such, escape route lighting can be seen to be a fundamental requirement of fire safety provision in all non-domestic premises and public areas of HMOs, whatever their use or occupancy levels.
2. Large public buildings such as shopping malls, museums and exhibition halls, etc., attract significant numbers of visitors who will not be familiar with the layout of the premises. Panic may therefore ensue should emergency evacuation be triggered by the sounding of the fire alarm. Open area / anti-panic lighting is relevant in such situations to aid in the identification of escape routes and exits and the guidance of people towards them.
3. High risk task lighting is a specific type of emergency lighting provided to ensure the safety of people involved in a potentially dangerous process or situation. It must be sufficient to enable the requisite shut-down procedures to be implemented. This type of lighting will only apply across a limited range of scenarios.

The above distinctions serve to emphasise the role of emergency escape lighting in fire safety and how it is adapted and applied, on a case by case basis, according to the specific use and occupancy levels of a particular building and / or areas within it.

Where is emergency escape lighting necessary?

In detail, as noted in the HM Government publication Fire safety risk assessment: offices and shops (p 100), an emergency escape lighting system should normally cover the following:

• Each exit door
• Escape routes
• Intersection of corridors
• Outside each final exit and on external escape routes
• Emergency escape signs
• Stairways so that each flight receives adequate light
• Changes in floor level
• Windowless rooms and toilet accommodation exceeding 8m²
• Fire-fighting equipment
• Fire alarm call points
• Equipment that would need to be shut down in an emergency
• Lifts
• Areas in premises greater than 60m²

It is not necessary to provide individual lights (luminaires) for each item above, but there should be a sufficient overall level of light to allow them to be visible and usable.

What are emergency lighting luminaires?

There are two main types of luminaire, the relevant standard for which is BS EN -2-22: self-contained and centrally supplied.

The self-contained luminaire, as it name suggests, contains all the essential components (i.e. battery, charger, control unit, lamp, diffuser and any test or monitoring facility) for it to function as an independent emergency light. As noted in the Fire Protection Association (FPA) Emergency Lighting Handbook (), this is the most common form of emergency lighting and is usually designed to be fitted to a wall or ceiling to illuminate a certain area or building feature. A typical example is the surface-mounted, rectangular bulkhead luminaire, although a wide range of self-contained luminaires is available including square, round and recessed / inset models.

Centrally supplied luminaires, also known as 'slaves' because they cannot function independently, are defined by BS EN -2-22 as follows: "luminaire for maintained or non-maintained operation which is energized from a central emergency power system that is not contained within the luminaire". Slave fittings contain the lamp and some of the control gear but the charger, battery and often the changeover device are located remotely and provide the supply to a number of luminaires. Again, the luminaires themselves come in a range of shapes and styles. The FPA handbook, referenced above, contains a useful table highlighting the pros and cons of slave versus self-contained luminaires (p 21):

Central power sources Self-contained Advantages Disadvantages Advantages Disadvantages Less expensive Separate wiring Ease / speed of installation Limited lamp power Long battery life if maintained Regular battery maintenance Flexible, extendibility Operation limit to battery operation temperature Few temperature effects Loss when central system in fire No battery room required Shorter life batteries Easier / automatic testing Battery cabinet often required No regular battery maintenance Not suited to harsh or hazardous environments Real time monitoring Limited flexibility No loss of total system Cost of periodic testing greater

Maintained, non-maintained and switchable emergency lighting

As noted in the HM Government guide to fire safety in offices and shops, referenced above:

"Emergency escape lighting can be both 'maintained', i.e. on all the time, or 'non-maintained', which only operates when the normal lighting fails. Systems or individual lighting units (luminaires) are designed to operate for durations of between one and three hours after the mains power supply fails. In practice, the three-hour design is the most popular and can help with maintaining limited continued use of the premises during a power failure (other than in an emergency situation)" (p 100).

Maintained emergency lights usually have two values for lumens (the measure of luminous flux, i.e. light flow, from a light source) in their technical description: a value for the output when the light is powered by the mains supply and another for the output when the emergency light is powered by the back-up battery. The latter is usually around 10 per cent of the full output.

Maintained emergency lights are often available as switchable units. This means that they can be switched between maintained and non-maintained modes of operation using an ordinary, wall-mounted light switch. This is useful in areas where there is no requirement for constant lighting, e.g. stairwells in a high-rise block of flats, where the light is only required when somebody takes the stairs instead of the lift. The emergency lights will, of course, still come on in case of a power failure, even when the switch is in the 'off' position. However, as indicated above, the emergency light output will be about 90 per cent lower than usual.

A disadvantage of non-maintained emergency lighting is that the condition of the lamp can only be ascertained through regular testing; it is no good waiting for a power cut to discover that it isn't working. This problem can be overcome, however, by installing self-testing emergency lights.

Non-maintained operation is usually favoured wherever possible, being cheaper in terms of energy consumption and the life of the fitting's components. In some premises, however, such as theatres and cinemas, the luminaires must always be lit, i.e. in maintained mode, so there is sometimes no choice in the matter.

In respect of maintained emergency lighting in areas where high levels of light are normally required, for example in the corridors of office blocks, a combined or sustained emergency luminaire can be installed. This type of unit contains two or more lamps, at least one of which is energised by the emergency supply and the rest by mains electricity. The mains powered part of these lights can usually be controlled by ordinary light switches. Typically, all the lamps will be lit under normal circumstances, but if the electricity supply should fail just the emergency lamp(s) will come on, powered by the battery.

Illuminated signs

Emergency luminaires are also available as signs; a typical example is the pictogram of the man running either through or towards an open doorway, with a directional arrow. Others may also bear some text, e.g. 'Fire Exit'. These lighting units are available in both maintained and non-maintained versions in a range of styles, from the simple box type through to the elegant 'blade' design with a slimline body. They can be wall or ceiling mounted or suspended from high ceilings with decorative chains. Pictograms and pictograms with text should not be mixed in the same premises.

Another type of illuminated sign is the photoluminescent or 'glow-in-the-dark' style, which again shows the man running with directional arrow and doorway, plus the words 'Exit' or 'Fire Exit'. These are available in three different sizes for wall mounting. These are not luminaires as such, but do serve to mark the fire escape route.

Please note that self-illuminating and photoluminescent signage do not count towards the emergency illumination requirements for a premises and still require a standard luminaire be installed near them as though they are plain plastic signs.

Way-guidance equipment

Photoluminescent marker tape, paint and floor discs are also useful for low level marking of escape routes, particularly at changes of level in the building, e.g. stairwells and uneven floors. As noted in the HM Government guidance reference above (p 101):

"To complement emergency escape lighting, people, especially those unfamiliar with the premises, can be helped to identify exit routes by the use of way-guidance equipment. Way-guidance systems usually comprise photoluminescent material, lines of LEDs, or strips of miniature incandescent lamps, forming a continuous marked escape route at lower level. These systems have proved particularly effective when people have to escape through smoke, and for partially-sighted people. They can be particularly useful in premises where they can provide marked routes on floors and in multi-storey premises they can direct people to escape routes which are seldom used."

LED emergency lighting: the way ahead?

With the focus increasingly on protecting the environment as well as energy and cost saving, the LED (light emitting diode) is becoming an increasingly popular choice of light source for emergency lighting luminaires. In addition, the government is currently offering a financial incentive to switch to low energy products: the Enhanced Capital Allowance (ECA) scheme enables businesses to claim a 100% first year capital allowance on investments in certain energy saving equipment, against the taxable profits of the period of investment.

LEDs contain no mercury and their low energy consumption, high efficiency and long life (typically 10 years) mean they are more environmentally sound than almost any other type of light source. They come on instantly, unlike some energy saving bulbs, and the fact that they are much smaller than, for example, the traditional fluorescent tube means that there is scope for much more stylish designs in emergency luminaires. State of the art models even incorporate three self-tests: a continuous battery test, a lamp test and a duration test. Over the lifetime of the product, this represents a significant reduction in maintenance costs.

Maintenance and testing of emergency escape lighting

Government guidelines (Fire safety risk assessment: offices and shops, p 101) state that all emergency escape lighting systems should be regularly tested and properly maintained to an appropriate standard (i.e. BS - Code of practice for the emergency lighting of premises). This testing has traditionally been undertaken manually although, as noted above, emergency luminaires are available with a self-test facility.

Depending on the type of installation, trained members of staff should be able to carry out most of the routine tests by themselves. As the test methods will vary, there may be some doubt, in which case it is recommended that advice is sought from the supplier or another competent person.

A typical test is via a key operated switch that is located either near the main fuse board or adjacent to relevant light switches. This is also known as a 'secret key' switch, as it designed to allow testing of emergency lights while preventing non-authorised operation of the test switch.

Testing would usually include the following:

• A daily visual check of any central controls if a centrally powered system with slave luminaires is installed;
• A monthly function test by operating the test facility for a period sufficient to ensure that each emergency lamp illuminates; and
• An annual full discharge test to ensure that the lamps are lit for the full discharge period (usually 3 hours) and that the batteries are re-charging

Particular care needs to be taken following a full discharge test. Batteries typically take 24 hours to re-charge and the premises should not be re-occupied until the emergency lighting system is fully functioning, unless alternative arrangements have been made.

It is best practice to keep a record of all tests in the fire safety log book.

Digital Addressable Lighting Interface (DALI)

At the cutting edge of emergency lighting technology is DALI - an international standard created specifically for digital lighting control. It guarantees the compatibility of products from different manufacturers and thus enables the combination of lighting solutions and various types of luminaire in a single installation. A DALI addressable emergency lighting system also performs all the requisite scheduled tests to BS : each luminaire in the system reports its test results back to the central panel or computer and, if a fault is detected, the unique address of the luminaire means that the source as well as the nature of the problem is immediately identified. Up to 120 luminaires can be controlled and monitored by a DALI touchscreen panel and, with the possibility of networking up to 10 such panels, a maximum of emergency luminaires can be monitored, with minimal maintenance costs.

Related Articles

Emergency lighting requirements: what you need to know
What's the difference between maintained and non-maintained emergency lighting?

 

Reviewed: 20/08/ (doc:68 V1.1). Our articles are reviewed regularly. However, any changes made to standards or legislation following the review date will not have been considered. Please note that we provide abridged, easy-to-understand guidance. To make detailed decisions about your fire safety provisions, you might require further advice or need to consult the full standards and legislation.

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