Creating Brighter Spaces with the New Lighting Norm EN-12464-1 - JULY 2021 A HELVAR WHITEPAPER
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Creating Brighter Spaces with the
New Lighting Norm EN-12464-1
A H E LVA R W H I T E PA P E R
JULY 2021
HENRI JUSLÉN
CHIEF FUTURE ILLUMINATOR
Ēm and
maintenance factor
Before we dive deeper into the Norm, use maintenance factor to take this
it’s worth explaining a significant into account in their design. So, for
the new lighting
term mentioned throughout the Norm example: if the required amount is
— Maintained illuminance. 1000 lux, the initial value could be
1250 lux (maintenance factor 0.8.
norm EN-12464-1
Maintained illuminance is illuminance —1250*0.8=1000) and then on the
at the time when maintenance is site, the light sensors can be used to
expected to take place. It should be control the lighting in a way that there
achievable even without any daylight, is 1000 lux.
just by artificial lighting. All lighting
systems and environments get old Another option is to program this
and/or dirty, and how much this constant light output to a led driver.
The EN-12464-1 lighting norm specifies lighting influences illuminance depends on The luminaire then automatically
requirements for people in indoor workplaces. the lighting system, environment, and dims up overtime to compensate
especially maintenance. for lost lumen output resulting from
It covers all indoor working ageing. The Norm defines maintained
areas including but not limited to —The new informative Annex clarifies Ēm refers to the illuminance level and illuminance on the working area in
offices, industry, healthcare, retail, glare requirements is the value below which the average its surroundings and for ceilings and
restaurants, hotels, museums, illuminance on a specified area should walls. Maintained semicylinderical
libraries, schools, and car parks. — Flicker and stroboscopic effect are not fall. Ēm is the figure that should illuminance is also defined in the
You could say it is easier to mention updated always be measurable in the specified tables. All of these have the same
what it doesn’t cover — outdoor area. In practice, it means that initial logic; artificial lighting should, at
working areas, underground mining or Arguably, the most crucial change in illumination in the new installation least, be able to always produce this
emergency lighting. the Norm was changing the structure needs to be higher. Lighting designers amount of light to the defined areas.
so that more information is added to
This norm replaces the previous 2011 the tables. Previously, many users
version. The main changes include: have solely focused on the minimum
requirements in the tables, missing
— The recommendations provided key details in the Norm, resulting
in the tables account for user needs in bad design and bad lighting. Or
more so than in the past at least not as good lighting that
the previous Norm was requesting.
— The impact of visual and non- Although the tables now have more
image forming effects of light are information, it is still important to note
elaborated that the central part of the Norm are
the chapters before the tables.
— Requirements for walls, ceilings
and cylindrical illuminances are This whitepaper looks at the Norm
moved to tables through lighting control glasses. To
— More advises on applying the understand the bigger picture, every
requirements when designing lighting designer must read the entire Norm.
scale of illuminance
In a similar way to the previous 2011 — the task is undertaken for an
version of the norm, recommended unusually long time;
steps of illuminance are given in the
new norm referring to EN12665: 5 - — the task area or activity area has a
7,5 - 10 – 15 - 20 - 30 - 50 - 75 - 100 low daylight provision;
- 150 - 200 - 300 - 500 - 750 - 1 000
- 1 500 - 2 000 - 3 000 - 5 000 - 7 500 — the visual capacity of the worker is
- 10 000. Under certain conditions, below normal.
designers are recommended to use
higher steps. If one or two conditions When you think about these
apply, one step is required, and if more conditions, many of them are often
than two conditions apply, then two very valid. The first two, ‘errors
steps are required. are costly to rectify’, and ‘accuracy,
higher productivity or increased
Arguably, the rarest condition is globe, this is quite normal.
Mentioned conditions for increase of concentration is of great importance
the middle one; ‘task details are of
maintained illuminance visual work is and are valid in several working areas.
unusually small size or low contrast’. The remaining condition: ‘the visual
critical:
The last three conditions require capacity of the worker is below
The cost of lighting is around 0.01% of
future knowledge. normal’ might be the most difficult
— errors are costly to rectify; the total cost of work. Lighting related
to neglect if, at the design phase,
devices, installation, and maintenance
A designer should know how long the workers are unknown. So, in
— accuracy, higher productivity or are quite small compared to the cost
people are working and their visual practice, most of these conditions
increased concentration is of great of space, training, and salaries. We
capacity. They might know the plan are valid in most projects, meaning
importance; could even say that errors are always
initially; however, it is difficult to know that two steps of higher illuminances
more costly to rectify than increasing
what happens after a short period. are recommended to be available for
— task details are of unusually small light level if that influences the error
users in working areas.
size or low contrast; rate.
The condition: ‘the task is undertaken
for an unusually long time’ is often The Norm also allows the use of a
valid, although we would instruct one-step lower illuminance under
workers to take regular breaks. ‘The certain conditions: ‘task details are
task area or activity area has a low of an unusually large size or high
daylight provision’ is often true and is contrast, or the task is undertaken
deeper in the rooms and work, which for an unusually short time’. These
is completed outside of daylight hours. options are possible from time to time.
For certain tasks and parts of the
task area, immediate
The Norm refers to the task area, or more, the immediate surrounding
immediate surrounding area and area should have at least 500 lx.
background area. Most of the focus
surrounding area and
has always been around the task area The background area is a horizontal
— the area where the task is and often area on the floor level. It is adjacent
not the horizontal layer. to the immediate surrounding area
background area
within the limits of space and should
Close to that is the immediate be illuminated with a maintained
surrounding area. It is at least a 0.5m illuminance of 1/3 of the value of the
area around the task area and its immediate surrounding area. For
illuminance relates to the task area larger rooms, the band should be at
illuminance. If the task area has 750 lx least 3m wide.
52 tables Towards the end, the Norm provides several tables. It is essential to read the entire Norm and not focus solely on the tables. Below is part of an example of arguably one of the most commonly referred tables - Offices. For specifiers, looking at this one table is not enough. There are always other areas than those mentioned in the table in every office. For example, Table - Traffic zones inside buildings and Table - General areas inside buildings: rest, sanitation and first aid room. These two tables are also relevant in almost every office.
lighting control
As previously mentioned, there are your old designs done by Dialux or
more recommendations provided in Relux. If you have carried out a design
the tables than in the past. The most aiming 500 lux to a task area just
significant change is the addition of by using direct lighting – look at the The last column in the tables in environments that are tuned to our
the column ‘modified’ to the tables. values at the ceilings. It is not easy the new Norm includes ‘specific own needs.
This forces specifiers to think: what to reach 100 lux at the ceiling using requirements’. Several areas note that
is the illuminance level needed? only direct lighting and only “required” “lighting should be controllable”. To If you are unaware of who the users
In earlier versions, this was only column values. fully understand this topic, it is crucial are, it is practical to design and install
explained in the text and not shown in to read chapters 6.2.4 and 6.6, where good quality light for different users
the tables, which resulted in a misuse The Norm provides a strong more instructions are provided, and and different circumstances.
of the Norm. recommendation: “This standard the reasoning explained.
recommends the use of the higher The Norm lists this in the form that an
Two further significant additions to maintained illuminance Ēm’ to The Norm states that “lighting adjustable system ensures that:
the tables are: ‘Maintained values give the user the full use of the lit should be adjustable to the actual
of cylindrical illuminance’ and environment. Designing a basic user needs”. This opens the idea of —The benefit of available daylight is
‘illuminance on the ceiling and walls’. lighting installation only fulfilling lighting being able to be tailored to maximised
These were also only mentioned in the minimum criteria limits the individual needs. Personal lighting —Occupancy of the space can be
the text and not shown in the tables. possible benefits of good lighting provides the opportunity to tune the taken into account
The values of these two have also quality.” By increasing, for example, light settings on your very own desk —Changes in visual tasks can be
been increased which may influence the illuminance at the ceiling; it is according to your needs, allowing catered for
lighting design considerably. very challenging even to try not to use you to manage the light settings you —Changes of occupant’s preferences
higher lighting levels also on the task prefer. This can boost satisfaction and or needs can be catered for
If you’re a lighting designer, here’s a area. productivity since we all feel better in
small exercise for you to check with
The overall focus of the Norm is on and CIE S 026 and highlights general
the visual aspects of lighting. It does, information about non-image forming
however, discuss the influences effects in the informative annex (B.5).
of light on health and wellbeing. It
repeats the known effects of light Arguably, the most interesting
on one’s mood, emotion, mental variability of light-related specific
alertness, and circadian rhythms. requirements to note is: “variability
of light is important in spaces that
Varying illuminances and varying are occupied for extended periods.”
energy and
colour temperature or spectrum per Examples of these types of areas
time and season can enhance people’s include classrooms, healthcare,
wellbeing. The new Norm, however, offices, and production spaces —
cost considerations
does not give exact information on pretty much covering a large variety of
how this variability should be done. spaces; you could say the variability of
Instead, it refers to CEN/TR 16791 light is essential almost everywhere.
Despite the Norm not mentioning how raise some cost considerations. Does
lighting control should be arranged, doubling the initial illuminance double
it does provide typical examples, such the cost? The cost effect of installing
as increasing or decreasing light more “light” is minimal.
output of luminaires, changing colour
temperature, or using different light Uniformity and glare limitations
scenes. define the number of luminaires
needed. This means that installing
The Norm underlines the starting more “light” does not affect the
phase of every lighting project without number of luminaires. When the
forgetting energy. “Lighting should number of luminaires stay the
be designed to meet the lighting same, the installation, cabling, and
requirements of a particular task, lighting controls do not generate
activity or space in an energy-efficient any additional costs. More powerful
manner.” luminaires can be, however, more
expensive. Although the same
It highlights the order of thinking mechanics could be used, an
— first, what is needed, and then increased number of LEDs or more
explains how to do it energy- powerful LEDs are needed. By using
efficiently. Thus, the visual aspects of more powerful LED drivers, the
light should not be compromised in luminaires are likely to become more
any situation, which begs the question: expensive.
how can you save energy in lighting?
However, in terms of the total lighting
The Norm provides an answer in the project cost, the difference is less
form of examples: daylight harvesting, than 10%. But even more importantly,
responding to occupancy patterns, the main cost consideration
maintenance characteristics and full should be done in relation to the
use of controls. energy which can be saved during the
lifetime of the lighting, and here, the
Using higher initial illuminances might answer is full use of lighting control.
Helvar Light over Time®
Helvar’s lighting profile creation and
implementation tool, designed to
balance the artificial lighting in our
daily environment and provide a more WELLBEING
natural lighting cycle.
full use of In the direct context of EN-12464-1,
this could be used in a way that the
lighting control
required higher lighting level would
be used during working hours and
beyond that time when occupancy and
lighting levels would be according to
the required minimum. NATURAL
But what exactly does ‘full use of platform, and tuning levels and
lighting control’ actually mean? parameters based on data. Click here to read more
about Light over Time
Traditionally, we might have thought The picture below shows a movement
of adding occupancy sensing and detector optimisation report. This
light sensors as they help keep light is created by analysing sensor data Watch the video
‘on’ only when needed at the planned in the cloud platform to detect if the
ALERTNESS
level. Nowadays, however, we have the system’s fade times are optimised
opportunity to add more intelligence to from an energy-efficiency and
lighting control. wellbeing perspective. This is just
one practical example of using more At Helvar, we have innovative tools to help implement
By smartly using sensor data, we intelligence to make spaces brighter. the perfect circadian lighting for users of the space!
can take a step towards full use of
lighting control. Intelligence, such as Implementing report
As stated in the Norm, lighting should
be controllable according to user
ActiveTune is just one
self-learning capabilities, would boost recommendations can be done example. Once you have scanned the
needs. The traditional way has been
functionality and future flexibility manually; however, a more intelligent QR code on the desk, the user will
to use different kinds of user interface
further. The next level of lighting way might be to let AI tune lighting have control over the lighting in that
panels. They can be wireless, self-
control would mean enhancing parameters continuously or area.
powered devices that are positioned in
lighting data, for example, at cloud periodically.
the most suitable location.
On-timer optimisation
Sensor A: 4103 System Testing_pir Sensor C: 4131 WC_pir Sensor D: 4132 WC_kaytava_pir This whitepaper is written during
the covid-19 era where touching
panels is not so favourable. In
these circumstances, the ability to
personally control the lighting can be
beneficial. Personal control can be
Lighting Time Saving (each luminaire/month) done via mobile phones.
is there room left for
Another option is lighting that adjusts
according to users’ personal needs
automatically.
Helvar WellTune is one
concept solution. With WellTune, it is
direct lighting?
possible to save and adjust individual
lighting settings.
It’s still possible to use only ceiling- With direct lighting, the most critical
When a user selects a working mounted luminaires aiming lighting parameter might be ceiling
place with a new working station, for uniform lighting in an area. illuminance. Ceiling based area
the individually tailored lighting Luminaires can illuminate task sensors can measure this value. They
parameters saved with the personal areas, immediate surroundings, and fit this role better than their traditional
laptop can automatically follow the background areas evenly. This type role, where they are used to evaluate
user to the new workstation chosen. of installation is a perfect choice, how much light is at the task area
This requires no action from the user. primarily when task areas are not below.
The best lighting systems are ones known well enough in advance. It also
where the lighting works without the provides flexibility should changes be In practice, this type of lighting
need for people to think about it. needed in the future. control could work in a way that the
lighting on the ceiling is always kept at
Despite this, this general solution is 100lux, and the lighting below, at task
not without its problems. For example, area, can be, for example, 600lux to
suppose there are shadowing 1000lux. Occupancy can be detected
These are just a few intelligent lighting solution options for lighting design according objects, such as the separation wall by area sensors controlling several
to the new Norm requirements. However, the Norm does not define “how”, so it is in the picture below. In that case, luminaires. Alternatively, another
important to remember that a designer has a lot of freedom to use their imagination. the installation density needs to be option could be to locate sensors to
enough, or the location needs to be every luminaire. This would improve
well planned to avoid shadows from measurements density leading to
objects or users of the task area. more exact lighting levels and more
significant energy savings.
flexibility of
Direct and indirect solutions provide With all of these solutions, it is
alternatives to a different use of essential to consider the whole
sensors. Area sensors could control lighting experience. The controlling
location and direction
indirect lighting in the whole room system should offer a seamless
or around the task area. Luminaire- experience so that you don’t recognise
based sensors could tune direct that it is working. Pretty clever stuff,
lighting depending on the specific task right?
area.
To get full use of lighting control, you
One option for lighting installation area sensors by grouping luminaires One option could be to use direct or should always consider connecting
in a room is to use direct or indirect in the correct way. It is essential indirect general lighting in a room and the system to a centralised
illuminance. If both directions are to note that luminaires need two add freestanding luminaires as and intelligence, such as a cloud platform,
controlled in the same way, the addresses to make this work well. where required. which provides the scalability and
solution is quite similar to the flexibility needed in the future.
previous ceiling illuminance example. If there is enough indirect lighting,
task area illuminance can be reached
Controlling indirect lighting and direct at the required level. This model
separately could provide exciting could work so that the whole room’s
benefits. For example, indirect indirect lighting is at the level that
lighting could be ‘on’ when part of the fulfils the ceiling, wall and background
space is occupied. This would take illuminance requirements.
care of suitable ceiling illuminance,
well illuminance, and background Occupancy sensors boost indirect
illuminance in the whole space. lighting to a level where “minimum”
task illuminance is achieved. Direct
Direct lighting could be used for task lighting is then manually put on by
area and immediate surrounding area users that need higher illuminance
lighting. This is possible to do with levels.our closing remarks
When considering the new Norm, it’s exist, you are recommended to use
essential to put the needs of end- higher maintained levels.
users at the heart when designing
future-proof lighting. Many of these conditions, such as:
“accuracy, higher productivity or
It is often the case that the increased concentration is of great
requirements of end-users are importance”, “the task is undertaken
unknown since the end-users for an unusually long time”,” the task
themselves are unknown. Light should area or activity area has a low daylight
be tuned according to users’ needs, provision” and “the visual capacity of
and lighting control already offers the worker is below normal”, exist very
excellent tools. often.
The Norm strongly advises building The future-proofness of installation
variability and adjustability to lighting. will increase with higher available
Using only the minimum in the tables illuminance, and then building lighting
goes against the Norm. If any of the control strategies beyond energy-
conditions mentioned in the Norm savings are possible.
We’re Turning Everyday Places into Brighter Spaces.
Throughout 2021, we’re celebrating our centennial anniversary. Our journey of
innovation and reinvention has enabled us to develop market-leading future-
proof lighting solutions across office projects worldwide.
To learn more about how Helvar can help you create
Brighter Spaces, speak to our team today!
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