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Intelligent and energy-optimised lighting systems based on the combination of daylight and the artificial light of sulphur lamps


The effective use of the available daylight for lighting purposes is an important contribution to the improvement of both the energy balance of a building and qlso to theindoor comfort of the occupants of rooms. The use and supply of daylight guidance systems sfor lighting, particularly areas far from windows, has therefore greatly increased.
The object of this project is to develop, construct and test an intelligent daylight guidance and conducting system. This will focus the solar radiation through a Heliostat mirror system and pass it through hollow light guides (HLG) into the interior of the building, whrere it is used for lighting purposes. Conducting losses are to be minimized and the effectiveness of various light extraction strategies improved by using suitable materials (microprism foil, highly polished aluminium foil). The fluctuation in the amount of daylight available means that it will be necessary to add a variable amount of artificial light. The previous lack of a suitable light source for this purpose has meant that there have been few applications or attempts in this fields. The development of the suphur lamp means that for the first time an efficient use of a daylight-dependent electronically-controlled artificial light source for this application is possible. The interesting properties of this environmentally-friendly light source (no mervury, very long life, dimmabl spectrum similar to daylight) make it exactly right for just this application. it is therefore planned as part of this project to erect a pilot system of whic the configuration can bevaried with regard to individual components and to construct a measuring apparatus to determine the technical properties of hollow light guides (HLG). Compared with conventional solutions using artificial ligh this system promises substancial saving potential with regard to electrical ene for lighting as well as distinctly lower servicing and installation costs. Furthermore, it is possible to transmit the light over great distances to illuminate areas which have little or no daylight. Il also offers a simple mea of filtering out unwanted areas of the spectrum (IR,UV) depending on the applic (e.g.museums) or time of year.
Because until recently there was no means of controlling sulphur lamps, no investigations were made into the possibility of using this combination of technologies. The objective of this research project is therefore to research properties of the described daylight guidance and conducting system, to test an optimize its operation and effectiveness with regard to energy, and therefore t able to provide the technical designer with scientifically-proven planning principles. Industry is to be provided with information on the further development and marketing of system components.

Funding Scheme

CSC - Cost-sharing contracts


19,Einsteinufer 17
10587 Berlin

Participants (3)

IKL i Skelleftea_AB

93122 Skelleftea
Via Di San Luca, 11
40123 Bologna
University of Göteborg
411 24 Göteborg