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ARTHELIO Intelligent and Energy-optimised Lighting Systems Based on the Combination of Daylight and the Artificial Light of Sulphur Lamps. Dipl.-Ing. Alexander Rosemann. TU Berlin Institute for Electronics and Lighting Technology Einsteinufer 19, Sekr. E6 D-10587 Berlin

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ARTHELIOIntelligent and Energy-optimisedLighting Systems Based on the Combination of Daylight and the Artificial Light of Sulphur Lamps

Dipl.-Ing. Alexander Rosemann

TU Berlin

Institute for Electronics and Lighting Technology

Einsteinufer 19, Sekr. E6

D-10587 Berlin

Tel: 030 - 314 22401 / Fax: 030 - 314 22161

[email protected]


  • Organisation of the Project

  • System Idea

  • Measurements

  • Prototypes

  • Lighting Planning with HLG


Technische Universität Berlin (Germany)

Institute for Electronics And Lighting Technology, coordinator

Ricerca e Progetto (Italy)

Office for daylight architecture

Göteborg University (Sweden)

Light education and research centre

Semperlux AG (Germany)

Luminaire manufacturer (since 11/99)

IKL / CelsiusTech Electronics (Sweden)

Microwave electronics (until 10/99)


Hollow light guides

End Mirror




Segment Luminous Fluxes Fi

Hollow Light Guides

Advantages of hlg
Advantages of HLG

  • Lamp and Luminaire are separated

  • Light Sources with high luminous flux can be used

  • Maintenance is simplified, thus reducing costs

  • Light (artificial and daylight) can be transported over a long distance

  • Light can be coupled out uniformly

System scheme
System scheme


I Headmodule - Heliostat with EIB/LON-interface

II Mixmodule - Addition of Sulphur Lamp Light

Depending on the Available Amount

of Daylight, EIB/LON-interface

III Transportmodule - Efficient Light Transport With Hollow

Light Guides with High-reflective Materials

(OLF, Miro)

IV Luminairemodule - Light Output without Glare

modular construction and flexible dimensioning facilitate

the integration in different buiding architectures

Sulphur lamp

Spektrale Verteilung der

Strahlungsemission der Schwefellampe

Sulphur Lamp

  • continuous spectrum, close to sunlight

  • low IR- and UV-Radiation

  • high system luminous efficiency (90 lm/W)

  • dimmable (20- 100%)

  • long lifetime

  • nearly flicker-free

  • nonpolluting (no mercury)


 Near Field Photometry (CCD-camera)

 Automated Data Aquisition

 Any shape of Cross Sectional Area

 Maximum Length: 30 m

 Maximum diameter: 0.5 m

 Eulumdat-data Output

First Goniophotometer that can do photo-metric measurements on hollow light guides

LID - HLG Segment

3-dimensional view

2-dimensional view

Lid of a hlg 180 output angle

1 m

4 m

7 m

12 m

LID of a HLG 180° output angle

Lid of a hlg 90 output angle

1 m

4 m

7 m

12 m

LID of a HLG 90° output angle

Demonstration object tub
Demonstration Object TUB




Prototype 1 carpiano italy1
Prototype 1: Carpiano, Italy

Sketch of the Daylighting Part

Lens Film

Prototype 2 berlin


Sulphur Lamp

Mixing Unit


Prototype 2: Berlin

Prototype 2 berlin1
Prototype 2: Berlin

  • The lighting should

  • supply the staircase with a sufficient

  • amount of light to use the staircase in a

  • quick and safe way

  • give good modelling to the people,

  • meeting in the staircase

  • provide good adaptation to the light

  • quality in the connected rooms, which

  • are illuminated by daylight (at daytime)

Validation of measurement data

Installation of a Lightpipe-system

Measuring the

Illuminance Distr.


Comparison of the Results

Photometry at the Lightpipe

Simulation of the Illuminated Scene

Validation of Measurement Data

Comparison with light plannning software tools

Results of Comparison:

Comparison with Light Plannning Software Tools

Expected results
Expected Results

  • Enhancement of Visual Comfort in Deeper Building Interiors

  • Reduction of Costs for Electric Energy, Heating/Cooling and Maintenance

  • Development of a Heliostat For the Combined Utilisation of Both, Daylight and Artificial Light in Hollow Light Guides

  • Optimisation of Hollow Light Guides by Analysing the Luminous Intensity Distribution Data Gained with the Goniophotometer

  • Completion of a Design Guide as a Helping Tool for Lighting Planners, Architects and Engineers

End of presentation
End of Presentation

Thank you for

your attention!