2923 concentrate on working in very stable, comfortable lighting conditions. The system is complemented by presence detectors that react to prolonged absence by dimming and then switching off the lighting. Environmental and social responsibility Qlab Laboratory of Light’s responsibility to the planet and future generations requires concrete action. The QLS system reduces the electricity required for office lighting by 7090%. All major components of the system are made of materials that can be easily and repeatedly recycled and reused. QLS contributes to improving the working conditions and social aspects of the company. The system improves the comfort and wellbeing of employees by allowing them to work in daylight and, when daylight is scarce, to adjust the lighting conditions to their individual preferences. This translates into increased satisfaction and improved team wellbeing. Studies show that optimal lighting through QLS helps to reduce stress and fatigue, resulting in increased productivity and creativity. The system simplifies the management of lighting within an organisation through central control and programming, allowing lighting scenarios to be tailored to suit needs and work schedules. The ability to monitor energy consumption and system performance enables better management and informed decisions regarding building energy efficiency. Increased productivity through optimal lighting conditions can contribute to better work organisation and team performance. This is all thanks to the intelligent use of daylight and its integration into the integrated QLS system. The sources of these savings: • Efficient use of daylight through the use of a light shelf • Precise control of illuminance at user eye level • Control of luminaire output to ensure that only as much artificial light as necessary is produced • Ability to set lower overall illuminance levels through the use of desk lamps that provide additional light only when needed • Zoning of rooms to allow different illuminance levels to be predefined for different zones • Use of occupancy sensors to dim or switch off lighting when not needed A key component of the lighting control system is a network of light intensity sensors located at QLS operating principle QLS in action - ARUP office workstations at eye level. The sensors, mounted on monitors, desk lamps, or partitions, detect the light reaching them, i.e. mixed daylight and general artificial lighting (without desk lamps). Where it is not possible to install sensors on fixed luminaires, it is possible to use small, freestanding table-top illuminance sensors, which are also useful in meeting rooms, on reception desks, and more. The heart of the lighting integration system is the controller and wall panel. The panel allows the user to define the expected level of illuminance in a particular zone, which is continuously maintained by the controller running in the background, controlling the operation of the general lighting luminaires. Changes in luminaire output are made slowly so as not to distract users, who can
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