With a workforce of more than 800 people, Leser can rightly claim to be Europe's largest manufacturer of safety valves – and the company continues to grow and grow. As the Hamburg headquarters gradually began to burst at the seams, the office building next to the River Elbe was replaced by a modern new construction: the "Leser Kontor" office development.
The architecture is characterised by clear lines and precise geometric shapes. The lighting also supports this puristic concept, with delicate light lines and distinctive luminaires blending to produce a linear design. The team from lighting solutions partner NDB Elektrotechnik even stayed loyal to this approach during the planning of the free-standing stairway. Two narrow light lines are installed parallel to each other on the floor of the staircase, which stretches through the entire building. Every walkway, whether in a corridor area or an office, also benefits from a pair of lateral light lines.
The office spaces and meeting rooms are dominated by flat and mostly linear fittings. This is not least due to the modular ceiling systems. LIGHT FIELDS evolution free-standing luminaires provide uniform levels of neutral white light for the workstations, which are each optimised for two employees. The SEQUENCE pendant luminaire was chosen for the meeting rooms. Only the canteen and recreation areas move away the straight-lined concept, with round PANOS evolution downlights offering a perfect contrast to the square ceiling elements.
The lighting in the "Leser Kontor" in Hamburg is unusual for an office building. How did the idea for this particular lighting solution come about, Mr Behrens?
Frank Behrens: The tender for this project contained an extremely conventional lighting concept with downlights and compact fluorescent lamps. However, we wanted to create something modern and new. Working with the DIALux lighting design programme, we mocked up a large office to simulate different versions using downlights, ceiling fittings and free-standing luminaires. The client wanted a harmonious, high-quality solution with maximum functionality and flexibility - especially in the working areas.
We aligned our design with the ceiling layout and opted for angular luminaires. There are also round downlights in one or two areas, but most of the fittings are linear or square. The client generally preferred flush-mounted solutions and did not want too many different products. We recommended the installation of SLOTLIGHT light lines at regular intervals to help make sure that the space is evenly illuminated and that the layout of the furniture can be adjusted at any time. Flexibility was therefore paramount here as well.
The CRAFT high-bay luminaires on the ceiling in the stairwells are somewhat out of the ordinary, but they illuminate the room-high walls in a uniform fashion. This is where a piping system for the installation of Leser safety valves is to be integrated. At first we thought about working with tracks and spotlights, but as this approach would have created a large number of dust traps, we decided to go with the ceiling solution.
You mentioned that the workspaces were particularly important. Which criteria did the lighting have to fulfil?
Frank Behrens: A prime example is the lighting intensity, which can be adapted to suit the needs of the employees. In addition, both the LIGHT FIELDS evolution free-standing luminaires and the SEQUENCE pendant fittings are controlled in line with daylight and motion detection using a KNX system. As adaptability was also an important issue, we installed a large number of power sockets in the floor to enable the flexible rearrangement of the free-standing luminaires.
Are there any aspects of the partnership with Zumtobel that you especially value and from which you could particularly benefit?
Frank Behrens: The seminars are very useful. You can find out about new products and solutions and get to know people from other companies. Using calculation programmes like QuickCalc to analyse aspects such as cost-effectiveness is also very helpful.