Daylight systems
for glare-free light and
pleasant room atmospheres
Daylight systems for well-being and efficiency
Without sunlight there’s no life, and without light there’s no well-being. Daylight can
be optimally implemented with innovative daylight systems from Siteco. These make
use of the physical laws of reflection, absorption and refraction to illuminate rooms
perfectly and also to avoid excessive warmth. Energy consumption for artificial lighting
and air conditioning is reduced and room comfort increases.
Benefits
Daylight systems from Siteco
• create pleasant room illumination with low glare and outstanding colour rendering.
• give rooms space and enable views to the outside.
• help to save energy and costs for lighting and air conditioning.
• can be adapted and designed individually for any building.
• have maximum, long-life quality with low maintenance, or are maintenance-free.
• guarantee optimal results in combination with luminaires and lighting management.
Lufthansa Aviation Center,
Frankfurt, Germany
The ecological climatic concept of the
office building takes into account all
energy aspects such as use of daylight, energy saving lighting, optimal
light quality and workstation design.
Architects: Ingenhoven Architects,
Dusseldorf; lighting consultant:
Tropp Lighting Design, Weilheim
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Daylight systems
Daylight for more health and well-being
Natural light from the sun is not only an inestimable
energy source, but in addition to water and nourishment
it’s one of the most important fundaments of human
life. This well-known fact is underlined by a comprehensive, systematic survey carried out by the Ilmenau
Technical University in Germany.
Dr. Joachim Fisch has brought together more than 700
scientific articles concerning the theme of light and
health. For example: daylight enables the formation
of vitamin D3 that promotes the lime construction
of bones and metabolic processes. It also improves
resistance to infections, increases physical and mental
Sunlight...
• tans skin with its shortwave UV radiation.
It also fades colours
• has high luminance values that cause glare
and reflections on objects
• with its longwave radiation it heats up rooms
and creates greenhouse effects
performance, enhances the supply of oxygen to
the organs and prevents premature symptoms of
tiredness. Sufficient daylight chokes production of
the sleeping hormone melatonin and reduces the
danger of seasonal affective disorder. Instead
of this, production of the hormone Serotonin
is increased that improves the sense of well-being.
Large windows support these positive effects by
allowing views to the outside, and they also create
a feeling of distance and a pleasant sense of space.
They ease orientation according to times of day and
year and also according to the weather.
Daylight...
• is the ideal light for viewing
• covers the complete colour spectrum. Only with
daylight do we see objects with their natural colours
• is able when correctly controlled to homogeneously
illuminate rooms in a unique way. This is precisely
what daylight systems from Siteco do
Health
Burda Medienpark,
Offenburg, Germany
The striking rooflight strips
in the six semi-circles of
the management building
are easily seen from
outside. Equipped with
micro sun shielding
louvres, they ensure
a bright, friendly
atmosphere and prevent
excessive warmth.
From the inside the
louvres are seen as fine
network structures.
Architects: Ingenhoven
Architects, Dusseldorf;
lighting consultants:
HL-Technik, Munich;
Werning & Tropp, Munich
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Daylight systems
No greenhouse effect
The radiation usually allowed to enter via
transformation of shortwave to long-
insulation glass falls upon objects and is
wave radiation. At the same time they
transformed to long wave radiation (far
ensure light guidance into the depths
Arts Centre, Leoben, Germany
field infrared). This can no longer penetrate
of the room. Their total energy
In the glazed roof of the
through the glass. The energy remains in the
transmittance is very low.
multifunctional building
room and the room temperature increases.
In comparison:
extension, the micro sun
Total energy transmittance rate of:
shielding louvre protects
The control of radiation with daylight
Standard double glazing unit g = 0.72
the interior from the direct
systems: highly reflective layers, for example
prismatic system
g = 0.15
ingress of sunlight.
of ultra-pure aluminium, reduce the
micro sun shielding louvre
g = 0.14
Architects: G. Domenig &
H. Eisenköck, Graz
Double benefits
Twin benefits from daylight systems
Daylight systems use the advantages of daylight and
compensate for its disadvantages. This double benefit
is provided by the modern daylight systems from
Siteco. In contrast to other solar protection systems,
they allow the ingress of daylight and avoid darkening
effects. At the same time they provide glare protection from direct sunlight as usually experienced with
insulated windows. Without protection, such high
illuminance levels lead to increased stress loads, error
rates and tiredness for the occupants, particularly
where computer workstations are involved.
In contrast, daylight systems improve the distribution
of daylight in the room, thus also allowing more
flexibility with the arrangement of workstations.
Whilst simultaneously, reducing heat gain within
rooms in summer months, thereby significantly
reducing the air conditioning and cooling loads
within a building
The principle of reflection
Prismatic systems
All Siteco daylight systems are designed
feature a blocking
to allow ’cool’ diffused daylight to
area in which all
penetrate the building, whilst reflecting
light entering is
the high thermal content of direct light
reflected, whereas
back into the atmosphere. The basis for
light from other
this is a directional dependent glazing
angles is allowed
panel. The blocked area is oriented
to pass through.
towards the direct sunlight path and
the allowable areas of the panel
towards the diffused sky. Both prismatic
and louvre systems are available for
Louvre systems
optimum results and these can be
take advantage
either fitted within a glazed system
or installed in front of them.
North
South
of their specific
form and high
The orientation and construction of
quality coating.
the chosen system depends upon the
Sunlight from
building’s location and geographical
pre-defined angles
alignment.
is not allowed to
pass through.
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Daylight systems
Villa Vauban, Luxembourg
A modern and energy saving lighting
solution for an exhibition building, with
daylight and dimmable luminaires.
Architect: Philippe Schmit, Luxembourg;
lighting consultant: Licht Kunst Licht,
Bonn/Berlin
Outstanding light as a combination
of natural and artificial light
As much daylight as possible, as little artificial light
as required – this is the principle that increasingly
governs convincing lighting concepts. This not only
takes advantage of the benefits of natural light but
also implements artificial lighting as the perfect
supplement. Controlled steplessly and with good
colour rendering, corresponding luminaires add as
much light as needed for specific lighting tasks.
Siteco sees itself as an expert partner for architects
and lighting consultants, offering a complete product
spectrum for such lighting solutions.
This includes innovative daylight systems and high
quality luminaires with specifically suitable lamp
technology. This garantees superior lighting results
that satisfy the highest demands in terms of workstation lighting.
A perfect combination
Intelligent sensor technology
Sensor systems increase the benefits of
modern luminaires. For example, integral
brightness and presence sensors in office
luminaires such as Novaluna® S and
Novaluna® P ensure constant lighting levels.
Such sensors also automatically switch
luminaires off (with a timed delay) as soon
as nobody is in the room.
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Saving energy
Saving energy with daylight systems
and lighting management
Using daylight means saving energy, because daylight
is free and is often available in sufficient quantities.
On this basis the theme of the resource-friendly
implementation of energy is becoming ever more
important. After all, lighting in many office buildings
represents more than a quarter of total energy
consumption. With efficient technology, such
expenditures can can be drastically reduced.
Daylight systems are the first important building
Saving energy
in three steps
block for efficiency. They aid in cutting requirements
for artificial lighting and therefore sustainably reduce
electricity costs. A second efficiency building block
is selecting the right luminaire system. Whether it’s
LED luminaires, highly efficient T16 lamps or other
technology, Siteco offers convincing solutions to
designers. A third building block for efficiency is
balanced lighting management systems to completely
exploit energy saving potential.
-35 %
(Reference: diffuser
-55 %
luminaire, T26-lamp and
conventional ballast)
-80 %
Step 1
Use of luminaires with
efficient light control, e.g.
with louvre or microprismatic
technology
35 % less energy costs
Step 2
Use of electronic ballasts
with T16 lamp technology for
higher luminous efficacy and
service life
55 % less energy costs
Landhaus Tirol, Innsbruck, Austria
Moveable prism blades
reduce room heat-up
without darkening the
interior. Architects:
Frank + Probst, Munich;
lighting consultants:
Bartenbach LichtLabor,
Innsbruck
Step 3
Daylight-dependent dimming
in connection with electronic
ballasts – constant lighting
levels in all weather conditions
80 % less energy costs
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Daylight systems
Integral planning for optimal benefits
Siteco has been an international partner for premium quality
lighting solutions for decades, and architectural conditions and
functional requirements are considered as part of complete projects.
The planning expertise of architectural and lighting design offices is
brought together with the photometric experience of Siteco that is
renowned across the world. All of this is aimed at optimal customer
benefits according to individual specifications and under cosideration of
customer needs, along with the implementation of special products
of the highest quality.
The task
The ALDI future store in Rastatt, Germany, is exemplary for this approach.
• Sales-promoting light that
• Energy consumption to be
reduced to 50% of a standard store
• Protection of goods from damaging
UV radiation to be guaranteed
• Roof domes should appear largely
transparent to ensure visual contact
to the outside
• Goods should appear with natural
colours
transforms shopping into an
experience
The solution
• The sales space of approximately
1000 square metres, was fitted
with 28 uniformly distributed roof
windows, each measuring 4 square
metres in size and equipped with
micro sun shielding louvres.
• The natural daylight creates mean
illuminance levels of up to 850 lux
according to weather conditions and
time of day.
• The use of luminaires for general
lighting could be reduced to the late
afternoon/evening hours
according to the season of the year
and weather.
• Light sensors measure the available
illuminance. Ballasts convert the
sensor signals to suit the
specifically selected dimmable
luminaires equipped with special
shop reflectors. The luminaires are
dimmed down most of the time.
• The result is a high quality light
atmosphere and indoor climate.
Foodstuffs appear appetising, and
packaged goods appear with their
natural colours.
Complete solutions
Aldi future store, Rastatt
Goods are optimally visible to
customers. Sources of glare on
glossy packaging for example
are avoided.
Architects: Finzel Architekten,
Würzburg; lighting consultants:
start.design, Essen
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Daylight systems
Four solutions for greater comfort
and less energy consumption
The architectural requirements are diverse, as are the individual specifications.
Siteco thus offers four different systems for solar and glare protection. Our experts gladly design
suitable systems together with lighting consultants, architects and building owners.
Moveable prism system
Stationary prism system
Function
Function The transparent and uncoated prism plates
The transparent prismatic plates of acrylic glass
of acrylic glass ensure solar protection for
are individually cut and fitted within double glazing
facades and glass roofs. The system prevents
units. Therefore they ensure solar protection for
heat radiation from the sun and allows
glass roofs with a high transmission factor for
diffuse light to pass into the interior.
diffuse daylight. One prism edge is coated with
The prismatic plates track the position of
purest aluminium to get a larger blockage range.
the sun with microprocessors and motor
The stationary prism system can also be used for
technology.
controlled light guidance in the room.
Technical data*
Technical data
Dimensions of prism element
310 x 750 x 12 mm
Max. dimensions:
approx. 1.80 x 3.00 m Total energy transmittance rate
g = < 12 %
or approx. 1.20 x 3.50 m
Total energy transmittance rate
g = < 15 %
Light transmission
• with solar protection function
= > 54 %
• in horizontal position
= 74 %
Light transmission
• directed
• diffuse
= 0 – 65 %
= 30 – 43 %
Heat transfer coefficient
U = 1.5 – 1.7 W/m²K
Airspace
20 mm
Colour rendering index
Ra = 98
Product overview
Micro sun shielding louvre
CombiSol
Function
Function
The rectangular plastic louvre made completely
The hexagonally formed plastic specular
specular with ultra-pure aluminium is fitted in
louvre with ultra-pure aluminium combines
double glazing units, and is optimised for lightly
high quality solar protection and reliable
inclined roof constructions, allowing a view to
protection from glare. It features two layers:
the outside. Its lateral and longitudinal lamellae
only light from a northern direction passes
within the glazing prevent the transmission of
through the outer into the inner layer. From
direct sunlight but allow the ingress of intensive
there it passes completely without glare into
zenith light.
the building interior.
Technical data *
Technical data *
Max. dimensions:
approx. 2.20 x 3.00 m
Max. dimensions:
approx. 2.20 x 3.00 m
or approx. 1.50 x 4.00 m
or approx. 1.50 x 4.00 m
Total energy transmittance rate
g = 14 %
Total energy transmittance rate
g = 12 %
Light transmission
Light transmission
• directed
= 0 – 55 %
• directed
• diffuse
= 12 – 38 %
• diffuse
= 0 – 45 %
= 13 %
Heat transfer coefficient
U = 1.1 – 1.5 W/m²K
Heat transfer coefficient
U = 1.4 – 1.7 W/m²K
Airspace
24 mm
Airspace
24 mm
Colour rendering index
Ra = 97
Colour rendering index
Ra = 97
* calculated/measured with double glazing.
Please request data applying to other glass specifications.
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Daylight systems
Moveable prism system
The flexible solar protection and daylight system
Moveable prismatic plates offer solar protection and
control the daylight: orthogonally incident sunlight
is reflected while daylight entering from other
directions is guided into the room. The uncoated
prismatic plates are arranged as lamellae and
installed to building facades and onto roofs. These
reduce excessive luminance in the window areas,
create ergonomic illumination at workstations
and a general comfortable atmosphere. A microprocessor controls not only the alignment of
the plates according to the position of the sun but
also processes weather data; with cloudy skies
the lamellae are automatically set to ensure
maximum light transmission and view. If required,
the automatic control can be supplemented with
manual command inputs.
Robust and moveable
The prismatic plates are rigidly
fixed to a frame construction via
shafts. The shafts have mechanical
and electronic tracking, controlled
by a microprocessor.
Always at the right angle
The microprocessor controls the
lamellae automatically according to
the position of the sun. Thus the sun’s
rays always impact at a 90 degree
angle on the rear of the prismatic
plates and are then reflected. Light
entering from other directions
brightens the complete room depth.
On facades and roofs
Moveable prismatic plates can be
installed vertically to facades or
horizontally upon glazed courtyards
or glass roofs. They consist of highly
transparent acrylic glass (PMMA), are
uncoated and weather-resistant.
Moveable prism system
Casualty hospital, Linz, Austria
The translucent optics of the
prismatic plates echoes the
transparent building concept.
Application areas for moveable prism system
Facade
Roof
New
building
Old building/
refurbishment
Solar protection
Glare
elimination
++
+
++
o
++
o
++ highly suitable + suitable o conditionally suitable
– not suitable
The moveable prism
systems are an attractive
element of design on the
facades. Architects: Prof.
Lintl & Moser Architekten ZT,
Vienna; system construction:
Bomin Solar, Lörrach
Moveable prism system
The prismatic plates are fixed to
the rotatable steel shafts with
aluminium brackets; linear
drive motors are implemented
for motion.
Moveable prism system
Casualty hospital, Linz, Austria
The hospital rooms of the six-storey bed wing
in the casualty hospital in Linz have windows
over the complete room height in a southwesterly direction. The moveable prismatic
solar protection has been installed in the
upper area of the balconies in front of the
rooms. In summer, the three superimposed
prismatic lamellae protect the complete
glazed facade. In winter the radiation of the
low sun enters below the prismatic lamellae
into the depths of the patients’ rooms. On
cloudy days the prismatic plates are rotated
to a horizontal position, and in this way the
guidance function of the prisms can be
specifically used for reflection of light into
the interior.
In the glazed roof of the
entrance area, a micro sun
shielding louvre protects the
interior from excessive heat.
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Daylight systems
Stationary prism system
Optimal solar protection and perfect light control
Stationary prism system not only use light control via
their prisms, but are further enhanced by one prism
edge being coated with specular ultra-pure aluminium
(AL 99.99). This enlarges the blockage range and
completely eliminates direct sunlight, allowing use
especially in inclined glass facades and roofs. The plates
are cut to suit and installed in insulated window panes,
rooflights and glazed roofs. This guarantees protection
from humidity and soiling. The technology
is adapted via various prism structures and the
orientation of the prismatic plates to the diverse
demands in terms of geographic location, inclination
of glazing and orientation of the building. Prismatic
systems are mainly implemented as solar protection.
They can however also be used for light control, and
both functions can be combined with ease.
Prisms with various angles
The basis of stationary prism
systems are prismatic plates of 8N
acrylic glass (injection-moulded).
These are smooth on one side and
feature a prismatic structure on
the other. Various prism angles are
available.
Use as solar protection
The flat plate side is oriented to the
outside: sunlight entering at right
angles is thrown back by the oblique
prism edges. The aluminium layer
on one prism edge also reflects light
rays from flatter angles.
Use for light control
Here the refraction of the light on
two non-parallel surfaces (prisms)
is used to guide the light into the
corners of the room. Glare is avoided
with this method.
Securely integrated in glass
Toughened safety glass
Molecular sieve
Edge composite
U-section
Aluminium spacer
Laminated safety glass
Stationary prism system
Bavarian Parliament, Munich
The current Plenary Hall was designed
with a completely glazed roof. The 470
square metre-large surface is equipped
with stationary prismatic plates.
Application areas for stationary prism system
Facade
Roof
New
building
Old building/
refurbishment
Solar protection
Glare
elimination
o
++
++
+
++
+
++ highly suitable + suitable o conditionally suitable
– not suitable
400 Siteco luminaires with
asymetric light distribution
have been installed between
the glass roof and the
translucent intermediate
ceiling below it.
Stationary prism system
The glass surface of the ceiling
merges with the glazed wall
cladding, thus blurring the
periphery of the actual space.
Stationary prism system
Bavarian Parliament, Munich
Since its refurbishment, the plenary hall fulfills
the contemporary, functional demands of a
modern cabinet room. In addition, innovative
technology in terms of lighting and airconditioning achieve energy savings of 60
percent. Thanks to stationary prism systems,
daylight has become the defining element
of the space that was formerly illuminated
only with artificial light. Depending on the
intensity of daylight, infinitely variable
switchable sources of light create optimal
lighting conditions. The use of state-of-theart technology for lamps, reflectors, ballasts
and control system results in the best possible
matching of daylight and artificial light.
The prismatic insert oriented
to the south avoids excessive
ingress of the sun’s rays and
overheating of the space.
Architect: Volker Stab, Berlin;
lighting consultants: Licht
Kunst Licht, Bonn/Berlin
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Daylight systems
Micro sun shielding louvre
Solar protection with a clear view
Micro sun shielding louvres consist of plastic louvres
featuring specular ultra-pure aluminium, with
outstanding reflective properties. Specially formed
lateral and longitudinal lamellae define the blocking
and transmission ranges for light. During installation
the closed lamella surface is aligned to the south and
the louvre aperture to the north, thus causing direct
sunlight to be reflected while intensive zenith light
and diffuse daylight is allowed to pass unimpeded
into the room. In this way a high level of ergonomic
light is achieved with precise colour rendering.
The micro sun shielding louvre creates a pleasant
room atmosphere, and is perceived as a fine network
structure, simultaneously offering viewers a free
view of the outside.
The highly sensitive louvres need to be completely
protected from humidity and dirt particles. In order
to offer a comprehensive guarantee, the systems
are always delivered in functional state, installed
in double or triple glazing.
Rectangular louvre form
The form of the individual louvres
is rectangular. Two systems are
available with variously inclined
main lamellae. The louvres of ASA
(injection-moulded) are specular
with ultra-pure aluminium (AL 99.99).
Slight colour variations may occur,
as with vapourised double glazing.
Optimal for lightly inclined roofs
Micro sun shielding louvres have been
designed for roof glazing and their
North
South
application is optimised for lightly
inclined roof constructions. While
the blocking area reflects direct sunlight, the highly pure aluminium
layer guides the diffuse light almost
completely without light spill into
the room.
Securely integrated in glass
Toughened safety glass
Molecular sieve
Edge composite
U-section
Aluminium spacer
Laminated safety glass
Micro sun shielding louvre
Daimler AG design building,
Sindelfingen, Germany
Micro sun shielding louvres can also be
integrated into highly complex roof forms.
Architect: Renzo Piano, Genua; lighting
consultants: Prof. Roland Greule, Hamburg; Heinz Tomaschewski, Karlsruhe
Micro sun shielding louvre application areas
Facade
Roof
New
building
Old building/
refurbishment
Solar protection
Glare
elimination
o
++
++
+
++
o
++ highly suitable + suitable o conditionally suitable
– not suitable
Micro sun shielding louvre
Micro sun shielding louvre
Mozarteum, Salzburg, Austria
During the refurbishment of the Mozarteum
Music College, the building was extended
with a transparent hall. This serves as a foyer
and auditorium. Its roof glazing equipped
with micro sun shielding louvres transforms
it into an entrance area and multifunctional
zone flooded with light. Daylight can be used
throughout the day, and this cuts costs for
lighting of the hall. The peripheral exercise
rooms equipped with glazed intermediate
walls also benefit. Firstly, electricity used
here for artificial lighting can be saved, and
secondly the micro sun shielding louvre
prevents direct glare from sunlight in the
exercise rooms.
Architects: Rechenauer Architekten,
Munich; facade consultant:
H. Stephan Engineering, Lauingen
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Daylight systems
CombiSol
Maximum solar and glare protection in one
CombiSol is a further development of the micro sun
shielding louvre. It is the first louvre system to combine high quality solar protection with reliable glare
protection, because CombiSol completely eliminates
glare from direct sunlight. The system thus fulfills
maximum optical requirements for example for
offices and control rooms.
The special feature is the construction of the system
with two areas: only light from a northern direction
passes through the outer into the inner layer. This is
formed like the specular louvre of a luminaire, and
controls and guides the light at an angle of less than
65 degrees into the interior. Even though the view
towards the outside is limited by the system, the
bridge to the outside is not completely disrupted.
The high quality specular louvre takes on the colour
of the background and does not modify the changing
colours of daylight. As such, viewers can enjoy the
changing weather and light atmospheres without
glare and with an optimal room climate.
Louvre with a hexagonal construction
The CombiSol elements feature a
honeycomb form on their upper
surface. They are constructed with
ASA (injection-moulded) and are
rendered specular with an extremely
thinly applied layer of ultra-pure
aluminium (AL 99.99). Here slight
colour variations may occur, as with
vapourised insulation glass.
Double light control
CombiSol takes effect on two levels.
The hexagonal form of the upper
layer represents both a blocking and
transmisson range: direct sunlight is
completely reflected and diffuse
Solar protection
Glare protection
daylight is allowed to enter. This
light is guided into the second layer,
and the room is thus supplied
homogeneously with diffuse light.
Securely integrated in glass
Toughened safety glass
Molecular sieve
Edge composite
U-section
Aluminium spacer
Laminated safety glass
Architects: Trapez Architektur, Hamburg
Lighting consultant: Vogt & Partner, Winterthur
Ergonomics conslutant: Maurer & Partner,
Heimenschwand
CombiSol Control room,
Hamburger Hochbahn AG
A modern control centre was constructed as a
superstructure to the existing management building
of Hamburger Hochbahn AG according to the latest
ergonomic knowledge. A 40 square metre-large
rooflight is situated above the computer screen
workstations. This guides daylight into the interior,
and the workstations are illuminated from above
without glare. Interference from direct sunlight or
reflections on screens is excluded. The lighting fulfills
optical requirements of the highest levels. Light colour
and light direction correspond to the perceptive
expectations of the users and in this way contribute
to the well-being of the employees.
CombiSol application areas
Facade
Roof
New
building
Old building/
refurbishment
Solar protection
Glare
elimination
–
++
++
o
++
++
++ highly suitable + suitable o conditionally suitable
– not suitable
Artificial sky
Models are displayed and
photometrically measured
In the Bartenbach LichtLabor
under all possible daylight
situations.
Photo: Peter Bartenbach, Munich
Planning
Customised solutions for all buildings
High quality lighting solutions are individual solutions;
each building and each room has different conditions
and places varying requirements upon lighting and
daylight technology. This is why we develop individual
daylight solutions for each single building. Results
from theoretical calculations and practical measuring
procedures flow into the planning. This includes for
example information about the precise sun position
at specific locations, the position of the building, its
alignment and of course its architecture. Simulations
such as those of the Bartenbach LichtLabor can
supplement computer planning. Here natural sky
conditions such as brightness, light distribution,
colour temperature and solar situation can be perfectly
simulated. Rooms can thus be experienced with real
daylight situations, brightness values and surfaces
in 3D. All for the purpose of individual concepts and
perfect lighting solutions.
Planning & warranty
Simulating the
individual, perfect
lighting solution
The complex interplay of all room
and light components can be
simulated via computer programs.
Here the modification of daylight
intensity and solar position is
taken into account. As such, any
luminance distribution can be
displayed in quick succession. This
in turn gives information about
possible room layouts in the future.
Zenith
21. June
Meridian
21. March
21. December
West
Sunset
Paths of the sun
South
North
Sunrise
East
The daily progress of the sun
depends on the geographical
location and the time of year. All
factors are taken into account.
Warranty
Siteco daylight systems are high quality products and their
Independent inspection institutes determine technical
quality is strictly controlled. They are able to document
values according to specifically valid standards. Testing
their performance with over 30 years of applications in
certificates with measurement results can be requested
buildings across the world. We vouch for the quality of the
from us. Other pane formats, constructions, installation
products and guarantee functionality and permanence.
and external factors may influence results.
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