Lighting refurbishment results in energy savings up to 45 %
The installation of 545 high-bay reflector luminaires of Zumtobel's Valuea product range results not only in a significant reduction of energy consumption, but also in an improvement of the lighting quality for the staff members. The luminaires were fitted with the most advanced fluorescent lamps and high-performance reflectors. Their superior lighting quality is corroborated by a very good colour rendering index (> 80) and more uniform illumination as compared to the previous solution. The luminous flux is virtually constant, and even ambient temperatures of 35°C pose no problem. "We opted for these high-bay luminaires mainly because of the numerous light distribution options they offer and the possibility to control the system as a group solution. In general, we found Valuea a high-quality product perfectly meeting the technical requirements and ensuring particularly high potential savings", says Markus Sand.
During the decision-making process, special focus was placed on the integration and use of a daylight-based lighting control system, in order to be able to save as much energy as possible. Since the major part, i.e. more than 90%, of energy is consumed during a luminaire's service life, this is where most energy can be saved. In order to facilitate the energy-saving use of luminaires, integrating a state-of-the-art lighting management system is the perfect solution. When the Valuea high-bay reflector luminaire was presented, it was especially the fact that it makes use of advanced ballasts which are also compatible with a lighting management system that was highly appreciated. Even simple dimming cuts energy consumption by 30% compared with a non-dimmable lighting solution. By integrating a daylight-based control system, additional energy can be saved. Another benefit for the client was the "flicker-free" illumination of rotating machines. Compared to conventional high-bay projectors operated with 50 Hz technology, the fluorescent lamps are operated with 22 KHz, which prevents a stroboscopic effect.
The Zumtobel Dimlite lighting management system installed allows easy commissioning by a plug-and-play mechanism. The required components are simply linked to a basic module and started via auto setup. Thus, with only little effort the client was able to achieve even more energy savings. It was easy to implement the required group control option, so that individual luminaire groups can be dimmed on their own as well as based on available daylight. Thus, artificial lighting is used only to the amount required for a lighting solution that conforms with relevant standards. The maximum illuminance level of 300 lx required for industrial bays is not affected by this, with optimum assistance by Valuea.It is also conceivable to integrate a presence detector into the lighting control system.
As Risse+Wilke Managing Director Dr. Kai Wilke sums up so appropriately: "The refurbishment of the lighting system has greatly enhanced the job quality for our staff members, saving resources and facilitating our every-day work. A perfect combination - in particular because thanks to the lighting control system, we are now able to respond flexibly to changes in the warehouse or manufacturing area."
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