Case Studies | General Lighting | Jul 06, 2012

Zumtobel and the City Council of Zurich Investigate Performance of T5/T16 Lamps and an LED System in a Field-Test

In collaboration with Zumtobel, the City Council of Zurich converted an existing lighting installation into an LED-only installation and compared the latter with an identical conventional solution used for the same application.
Overall result of the corridor lighting investigation, fluorescent lamps versus LEDs Overall result of the corridor lighting investigation, fluorescent lamps versus LEDs

Fluorescent lamps are considered highly energy-efficient. Depending on the type of luminaires used and their efficiency, however, the complete system does not always work equally well. Compared with pendant luminaires, for instance, the efficiency level of the popular light lines, in particular, is critical in many cases. The City Council of Zurich wanted to know for sure and, jointly with Zumtobel, launched a pilot project involving LED light lines and an optimised lighting management system. The results are amazing!

At the Administrative Centre of Werd, the Public Works Department of Zurich's City Council converted an existing lighting installation into an LED-only installation and compared the latter with an identical conventional solution used for the same application. Both corridors are fitted with a 28-metre light line each and are subject to the same conditions of use. In the case of the conventional solution, the light is switched off whenever the corridor is not used for 10 minutes; in the case of the LED system, the switch-off delay of the presence detectors has been reduced to one minute. Because LEDs are wear-free and start immediately, there is no problem with this setting.

In the case of the conventional solution, 420 W have been installed in each corridor; in the case of LED, 187 W have been installed. This means that the installed load is reduced by
56 % - at the same level of illuminance. In combination with the lighting management system and reduced switching times, this eventually results in energy consumption being reduced by 81 %!

In spring, the LED model of the energy-efficient  » Slotlight II was introduced as a standard product.

For additional details, please downloade the "Werd Administrative Centre LED Pilot Project Comparison" study or visit the Zumtobel website.

About Zumtobel:
Zumtobel is a leading international supplier of integral lighting solutions that enable people to experience the interplay of light and architecture. As a leader in innovation, the luminaire manufacturer provides a comprehensive range of high-quality luminaires and lighting management systems for the most varied application areas of professional interior lighting – including offices and educational facilities, presentation and retail, hotels and wellness, health and care, art and culture as well as industry and engineering. Zumtobel is a brand of the Zumtobel group with its head office in Dornbirn, Vorarlberg (Austria).

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