en12464 copy
DESCRIPTION
An overview of the ammendments to the EN12464 building regulations and Part L.TRANSCRIPT
EN12464-1
major changes
✦ Lighting energy requirements: linked to EN 15193 – LENI (kWh/m2/year)
✦ Background area: task area – immediate surrounding – background area
✦ Illuminance/uniformity: for each task and activity – revised Clause 5
✦ Illuminance/uniformity: for immediate surroundings and background area
✦ Minimum illuminance on room surfaces: for example, walls and ceilings
✦ Mean cylindrical illuminance: Ez1.2m (1.6m) above floor
✦ Modelling index: informative values (Ez/Ehi)
✦ Calculation grid: grid points for control of illuminance and uniformity
✦ Luminaire luminance limits: in areas with display screen equipment
✦ Light and health: general statements on variability in light
✦ Daylight: general requirements
energy efficiency requirements
Energy savings can be made by harvesting daylight, responding to occupancy patterns and
maintenance characteristics of the installation, and making full use of controls.
A procedure for the estimation of the energy requirements of a
lighting installation is given in EN 15193- Energy Performance of
Buildings
Includes LENI (lighting energy numeric indicator)
leni
LENI is calculated on the lighting for the entire building. At the same time the lighting shall conform to current standards and recommendations (SS EN 12464-1).
Wtotal is the sum of Wlight and Wparasitic and is stated in kWh/year
A is the building's total* interior area: (m2).
* The area is calculated inside the outside walls excluding non-used cellar areas and unlit rooms.
LENIcalculated = Wtotal / A
* can be calculated on an annual basis, including annual, monthly or time basis.
leni
leni
part l
part l- efficacy
part l- controls
part l- controls
part l- metering
part l- problems
T5 Luminaire
• 60 llm/cw
Empty Office at 2am
• Manual switch left on
part l- problems
T5 Lamps
• 80-100 lm/w
Black box
• LOR 0%
part l- the future?
en12464
Adequate and appropriate lighting enables people to perform visual tasks efficiently and accurately. The
degree of visual comfort required in a wide range of work places is governed by the type and duration of
the activity.
lighting on the background area
The background area is taken as≥ 3m wide border
around the immediate surrounding area and
should be lit with a maintained horizontal
illuminance on the floor.
task area task area lxlx
immediate immediate surrounding surrounding
area area lxlx
background background area area
lxlx
> 750500300200150100>50
500300200Etask
Etask
Etask
Etask
1/3of
immediate surroundings
luminaires + flat screens
Screen high state luminaireScreen high state luminaire High luminance screenHigh luminance screenL> 200 cd/m2L> 200 cd/m2
Medium luminance screenMedium luminance screenL> 200 cd/m2L> 200 cd/m2
CASE A(positive polarity and normal
requirements concerning colour and details of the shown
information, like used in office, education etc..)
<3000 cdm/m2 <1500 cdm/m2
CASE B(Negative polarity and/ or higher requirements concerning colour
and details of the shown information, like used in office,
education etc..
<1500 cdm/m2 <1000 cdm/m2
surfaces
0,2 to 0,40,2 to 0,4
0,5 to 0,80,5 to 0,8 0,7 to 0,90,7 to 0,9
0,2 to 0,70,2 to 0,7
mean cylindrical illuminance
The required maintained mean cylindrical illuminance (average vertical plane illuminance) in the activity and interior areas shall be;
The cylindrical illuminance shall not be less than 50 lx.
Uniformity of illuminance U > 0,10- on a horizontal plane
1,2m above the floor.
For areas where good visual communication is important,
The maintained cylindrical illuminance Ez at 1,2m above
the floor level should not be not less than 150lx with U
>0,10
modelling
a value between 0,30 and 0,60 is an
indicator for good modelling
schedule of lighting
The size and position of the task area should be stated and documented.If unknown the whole area is treated as a task area or is uniformly lit
(U> 0.4)
Ref. no.Type of area, task or
activityĒmlx
UGRL Uo Ra Specific requirements
5.26.1 Filing, copying, etc. 300 19 0,4 80
5.26.2 Writing, typing, reading, data processing
500 19 0,6 80 DSE-work, see 4.12.2.
5.26.3 Technical drawing 750 16 0,7 80
5.26.4 CAD work stations 500 19 0,6 80 DSE-work, see 4.12.2.
5.26.5 Conference and meeting rooms 500 19 0,6 80 Lighting should be controllable.
5.26.6 Reception desk 300 22 0,6 80
5.26.7 Archives 200 25 0,4 80
illuminance grid
longest dimension longest dimension of the areaof the area
max distance (p) /Min grid max distance (p) /Min grid pointspoints
0.40m 0.15 or min 3 points
0.60m 0.20 or min 3 points
1.00m 0.20 or min 5 points
2.00m 0.30 or min 6 points
5.00m 0.60 or min 8 points
10.0m 1.00 or min 10 points
25.0m 2.00 or min 12 points
50.0m 3.00 or min 17 points
100m 5.00 or min 20 points
The maximum grid size should be:p = 0.2 x 5 log d where: p ≥10‘d’ is the longer dimension of the area (m)
However, if the ratio of the longer to the
shorter side is two or more then ‘d’ becomes
the shorter dimension of the area, and ‘p’ is
the maximum grid cell size (m).)
illuminance grid
colour rendering
The minimum value of colour rendering index for distinct types of interiors (areas), tasks or activities are given in clause 5.
It is important for visual performance and the feeling of comfort and well being, that colours in the environment, of objects and of human skin are rendered naturally, correctly and in a way that makes people look attractive and healthy.
Safety colours according to ISO 3864-1 shall always be recognisable as such.Higher colour rendering indexes are used when critical colour rendition is required.
The minimum value of colour rendering index for distinct types of interiors (areas), tasks or activities are given in clause 5.
NOTE For accurate rendition of colours of objects and human skin the appropriate individual special colour rendering index (Ri) should be considered.
daylight
daylight
•supply all or part of the lighting
•offer potential energy savings
•vary in level, direction and spectral composition
•provide variable modelling and luminance patters
•give visual contact with the outside environment
variability of light
Light is important to people’s health and wellbeing.
Light affects the mood, emotion and mental alertness of people.
Varying lighting conditions in time by higher illuminance, luminance distribution with daylight and/or dedicated electric lighting solutions…can stimulate people and enhance their wellbeing.
light + health
light + health
light + health
light + health
light + health
light + health
light + health
light + health
light + health
en12464 in practise
THANK YOU FOR YOUR TIME
ANY QUESTIONS?