In offices where we spend most of the day, it is an important design criterion that lighting provides sufficient conditions for visual comfort and performance. LED technology has long been used in offices and administrative buildings due to its long service life and low energy consumption. In addition, LED lighting systems that can be integrated with smart control systems enable long run operation and lower maintenance costs and efficient use of energy. Proper lighting should be compatible with office architecture as well as providing good vision conditions. Static and standardized lighting solutions have been replaced by flexible, high quality, dynamic and customizable solutions.
It is possible to save energy and reduce maintenance costs, while innovative lighting technologies, efficient light sources and lighting control systems provide visual comfort level in the work area.
We will often hear about “Green office” or “Sustainable Office” concepts in the future due to their economic, environmental and social advantages. Green concepts will provide sustainability in offices and will enable companies to use their resources efficiently.
Thus, these offices will allow employees to work productively in greener environments where they can feel good and there are minimum* carbon footprints. The annual electricity consumption value spent for lighting in office buildings has a large share in the formation of greenhouse gases that trigger global warming. As the amount of power consumed for illumination decreases, the emission of harmful gases to the environment will decrease in the same way.
LEED and BREEAM certification systems are the most common systems in the world for green building.
LEED Green Building Certification, issued by the US Green Building Council (USGBC), is a rating system that defines high-performance buildings. BREEAM is a green building rating system that sets out the criteria for designing, building and operating environmentally friendly buildings on British, European and local standards.
While limiting W/m2 illumination intensity values in the office environment, LEED predicts that the BREAAM brightness level will be 70% on the working surface and 50% homogeneity in the walking areas outside the working area.
“Energy Performance and Regulations of Buildings”, which has been put into effect in our country in 2009, aims to provide efficient use of energy and to reduce greenhouse gas emissions of buildings to minimum level. According to the criteria in this regulation, buildings are classified according to their energy consumption and greenhouse gas emissions. As a result of this classification, the buildings are awarded “Energy Identity Certificate”. In 2011, it became compulsory to submit EIC certificate in order to obtain a building license.
When combined with the right lighting technique and the corporate image that the company wants to reflect, it is possible to create inviting and sophisticated spaces that are pleasing to users. The ambience to reflect the image of the company in the entrance/reception areas can be revealed by different lighting techniques. A well-planned lighting design, high color rendering qualities, balanced and efficient distribution of lighting in horizontal-vertical planes, strengthens the corporate image that the company wants to reflect and increases prestige of company in the eye of visitors. Large windows, rear-illuminated opal diffuser ceiling panels, indirect lighting luminaires create optical depth and strengthen the architectural character of the space. Supporting the illumination with the accent lighting prevents it from being perceived as monotone. A more free line can be created in the entrance/reception areas with respect to the lighting technique. These areas are prestige areas that are designed with lighting techniques where the ambience is foregrounded as a concept.
CORRIDOR & CIRCULATION AREAS
In the offices, corridors, elevator halls and transit areas are not used continuously. It is recommended that luminaires with long life, frequent maintenance and high color rendering are used in these environments. Products that emit wide-angle light illuminate the walls, allowing the space to be perceived as wider and brighter. In addition, it is possible to break the monotone with hidden lighting and RGB applications and to bring the ambience to the forefront.
The corridor and transition areas support quick access to different parts of the building. Lighting the vertical planes allows the users to feel safe. In long corridors with continuity, monotony can be avoided with accent lighting. In corridors that do not receive daylight, it is possible to simulate daylight with color temperature changes. At the same time, security lighting is also important in corridors with emergency escape routes.
Homogenously distributed lighting systems that do not create uncomfortable glareare generally preferred as they support the perception of the space in a positive way and ensure the concentration of users. Direct or direct/indirect light emitting stalactites or grouped surface-mounted products are used to illuminate the working area. The wall or vertical planes on which the screen or presentation table is placed can also be illuminated using different lighting techniques. Lighting the vertical planes contributes positively to the visual ambience. In meeting rooms where interviews are held with customers, the lighting should support corporate identity. In accordance with the architecture of the space, logo and similar architectural elements can be brought to the foreground with accent lighting. Effective use is provided by presence detectors and daylight sensors in these areas which are not used continuously. In addition, lighting scenarios for multi-functional use can be included in the planning.
CAFETERIAS AND CANTEENS
In the cafeteria and dining hall areas, it is expected that the lighting system to be designed will support the function of the space and at the same time create an appropriate ambiance for communication. The positive atmosphere that is normally set in these areas, which are normally used for short periods of time, helps employees to accumulate energy in a short time. At the same time, in recreational areas, where people are socialized, it is important that the face expressions and mimics of the persons are perceivable correctly. Exposure of food and drink stands with high rail spots or stalactites with high color-rendering index has an appetizing effect. As it allows flexible table layouts, surface-mounted or under-floor lighting luminaires can be used in cafeteria areas where general lighting solutions are preferred. Based on the interior design, stalactite products that provide regional lighting on a table or surface-mounted products that can be mounted on a wall can be used. It is ideal to create different ambiances with multi-layered lighting design in the same environment and to create rich and intriguing atmosphere.
It is recommended to use luminaires which do not cause irritating glare in wet areas with reflective and shiny surfaces. In addition to general lighting, mirror-front lighting provides the desired visual comfort conditions. The ability of the person using the mirror to see him/herself comfortably and completely depends on the lighting layout around the mirror. Generally, it is proposed to make the mirror-front lighting with light sources with opal diffusers which are located vertically on both sides of the mirror and will not cause glare. There are also decorative applications where light sources are used vertically on the mirror or all around the mirror. It is possible to make lighting systems more energy-efficient and more effective with presence detectors. In rest rooms and wet areas that are intensively used for a short time, they prevent unnecessary energy consumption in the areas where no sensors are used.
It is recommended to use lighting luminaires that provide adequate illumination in the horizontal and vertical planes outside the office environment and that do not cause irritating glare. It is ideal for the lighting system to be designed does not create sharp-hard shadows. Inadequate lighting and long shadows should be avoided since they create risk of falling particularly in stairs. It is expected that the luminaires should have impact and shock resistance to the external environment conditions and high IP protection class. High mast, column and bollard type luminaries can be used for general lighting. In addition, wall-mountable bracket lamps and floor-mounted luminaires provide direction by defining vertical planes. Under Canopy, products with a minimum IP40 degree of protection should be used. The products to be used generally are expected to highlight some structural elements in accordance with the corporate identity and to reveal the architect. Energy efficient LED systems are ideal for façade lighting applications as they can provide different color combinations and work efficiently in outdoor conditions.