Tim Sehl
Dipl. Ing.
Otto-Prein-Straße 12
59174 Kamen, Dortmund, NRW
+49 1520 8503071
+49 2307 9109060
In the basic evaluation phase, we lay the foundation for successful lighting design. This includes clarifying the scope of work, advising on performance requirements, defining project objectives, and establishing clear interfaces with all specialist planners involved. This phase ensures transparency, planning reliability, and provides the basis for economical and standards-compliant lighting solutions.
A successful lighting concept meets the highest standards of both design and lighting technology. It is based on the latest state of the art as well as on insights from visual perception and lighting ergonomics.
Lighting design takes into account all relevant standards and guidelines and is aligned with modern certification systems such as DGNB and International WELL Building Institute (WELL).
Lighting can only unfold its full effect in harmony with architecture. Spatial perception is shaped through targeted accentuation, directing attention and enhancing atmosphere.
Close coordination with specialist planners, manufacturers, and executing trades streamlines both the planning and implementation process.
The use of modern sensors and control systems enables highly energy-efficient and sustainable lighting installations. Particular attention is given to minimizing environmental impact, especially when planning outdoor lighting.
The lighting is assessed based on clear and measurable criteria:
- Illuminance (horizontal and vertical)
- Luminance on surfaces
- Uniformity of illumination
- Light characteristics (e.g. direct/indirect, accent lighting)
- Energy performance indicators (power per area)
- Impact on the surrounding environment
In this phase, the project requirements and design parameters are analyzed and used to develop the planning concept. Technical requirements and efficiency potentials are defined. The preliminary design, together with the determination of a cost framework, lays the foundation for an economically viable and aesthetically meaningful lighting design.
Good lighting design begins with clear and competent advice – and it doesn’t have to be a large-scale project. We also provide targeted support to architects, municipalities, and engineering offices for smaller tasks or specific questions. An early professional assessment helps to avoid costly planning mistakes and significantly improve the quality of your project. In many cases, just a few hours of consulting are enough to make well-informed decisions, develop ideas, and make subsequent planning more efficient.
Professional lighting design for offices and public
buildings – compliant with standards, energy-efficient, and future-proof. This
includes display screen workstations in offices, public administrations,
schools, universities,
and other educational institutions.
We also cover work environments for the police, fire
services, and federal authorities, as well as circulation areas such as
stairwells and atriums.
Planning is carried out in accordance with
DIN EN 12464-1
and ASR A3.4, ensuring sustainable, comfortable, and safe lighting solutions.
In the schematic design phase, we develop a lighting design concept in accordance with all relevant standards and regulations (including DIN EN 12464-1, ASR A3.4, and DIN EN 13201).
To verify photometric performance, we prepare detailed lighting calculations using DIALux evo and Relux.
- CAD planning
- Cost estimation
- Lighting control
- Power demand and energy efficiency
- Documentation
- Coordination with project stakeholders
- Coordination with manufacturers
- Interface coordination
Organization and execution of lighting mock-ups as a key element, allowing the real lighting effect to be experienced directly and providing a solid basis for design, technical, and investment decisions.
Planning recommendations are individually adapted to the specific project requirements. This creates a time- and cost-efficient planning process that is precisely aligned with the project’s objectives. Targeted optimizations can have a significant impact on the overall project.
Industrial lighting requires specialized expertise and extensive experience. We design lighting solutions for workplaces in both indoor and outdoor areas, including high-risk zones, production facilities, warehouses and logistics centers, heavy industry, power plants, mines, and laboratories. Our objectives are optimal visibility, accident prevention, and quality assurance. All planning is carried out in accordance with DIN EN 12464-1, DIN EN 12464-2, and ASR A3.4 (4.3), taking into account the specific requirements of each site. Thanks to our experience and technical expertise, we develop lighting solutions that are both economically efficient and safe.
In the detailed design phase, the preliminary design is developed into a fully executable solution. We refine the planning based on the requirements of HOAI service phases 3 and 4, coordinate closely with specialist planners, contractors, and luminaire manufacturers, and, if necessary, develop customized luminaire concepts.
Our services include CAD planning, lighting calculations using DIALux evo and Relux, cost estimation, preparation of tender documents, and comprehensive project documentation.
Lighting mock-ups are carried out to assess the actual lighting effect directly on site.
With professional illuminance calculations using DIALux evo and Relux, we provide precise foundations for indoor and outdoor lighting, circulation areas, sports facilities, and exterior spaces. These calculations serve as proof of photometric performance for planning, approval, and cost estimation. The results are visualized, documented, and exported — either as CAD files or in tabular form — providing clear decision-making tools for architects, municipalities, and engineering offices.
Facade lighting creates atmosphere, orientation, and
identity. We design lighting concepts that accentuate architecture and
highlight buildings and outdoor spaces in an aesthetically striking way.
Our planning considers both near- and long-distance
visibility, integration into urban planning, and the specific requirements of
public spaces, plazas, and parks. Particular attention is given to
environmentally responsible lighting design with controlled light emissions.
Exterior Lighting – Safety, Orientation, and Atmosphere
in Public Spaces A well-designed exterior lighting system plays a decisive
role in ensuring safety and enhancing the quality of life in public spaces.
It not only provides sufficient visibility but also creates orientation and a
heightened sense of security for all users.
Streets, paths, squares, schoolyards, and cycleways are designed to be safe,
pleasant, and functional through balanced lighting design.
The focus lies on safe traffic guidance, accident
prevention, and the reduction of so-called “fear zones.”
Targeted light distribution can illuminate dark areas and neutralize potential
hazards without overlighting the surroundings or disturbing nearby residents.
The planning of exterior lighting is carried out in
compliance with applicable standards and guidelines such as DIN EN 13201 for road and pathway lighting.
In addition to functional quality, environmental compatibility is a key aspect.
Modern luminaire systems and precise light control prevent stray light, reduce
light emissions, and protect nocturnal wildlife.
We provide consulting services for municipalities, urban
planners, and engineering offices.
Together, we develop efficient, economical, and sustainable lighting concepts
that reduce energy consumption and maintenance costs — without compromising
safety or design quality.
The result is exterior lighting that provides safety,
enhances spatial experience, and protects both the environment and natural
resources.
During commissioning, we ensure that the lighting performs exactly as planned — or even better. On site, we align the luminaires, define dimming levels and lighting scenes, and fine-tune the system to perfectly match the building and its specific use context. We verify actual photometric parameters such as illuminance, color rendering, color temperature, and flicker index, and compile a complete set of documentation including photo records. The result is lighting that not only meets technical requirements but also creates an atmospheric, efficient, and practical solution.
In the healthcare sector, lighting serves a dual purpose: it must meet technical standards and requirements to ensure optimal working conditions while also supporting the well-being of patients and residents. We design standard-compliant lighting for hospitals, medical practices, nursing and therapy facilities, senior residences, and residential care homes, as well as for religious buildings such as churches, mosques, and temples. Through well-considered lighting solutions, we create safety, orientation, and atmosphere — lighting that supports people and facilitates processes.
We are happy to create a visualization of your project,
including design variants and clear decision-making bases.
Our lighting concepts are
realistically visualized in 3D, enabling architects, municipalities, and
engineering offices to evaluate the lighting effect in the space at an early
stage. This provides a solid foundation for confident decisions regarding design,
compliance with standards, and energy efficiency. 3D simulation of lighting
effects (interior and exterior) and variant comparison for informed
decision-making
- Light characteristics: direct / indirect lighting, accent lighting
- Materiality & surfaces: reflections, luminance levels, spatial perception
- Environmental impact: light emissions, stray light, neighborhood compatibility
- Schematic views & black plan
- Data delivery: renderings, reports for committees and tender procedures
With professional Lighting
level measurementin accordance with DIN EN 12464-1, we provide municipalities,
engineering offices, and facility operators with a reliable basis for
refurbishment projects, funding applications, expert reports, and
certifications.
- On-site orientation measurements (Class C)
- Illuminance measurements in accordance with DIN EN 12464-1 (Class B)
- Measurement of work areas in indoor and outdoor environments
- Measurement of public spaces and circulation areas
- Measurement of sports fields and halls (certifications for professional use)
- Verification of compliance for workplaces
- Expert reports
- Measurement of emergency lighting systems
Lectures on lighting and design topics in line with the latest research and technological developments.
- Dialux Evo & Relux
-
Light color and color rendering
-
Exterior and interior lighting
- Outdoor recreation areas and safety-critical spaces
- Lighting of circulation areas and traffic routes
-
Light emissions and environmental protection
-
Energy-efficient refurbishment
-
Occupational safety and productivity
- Human Centric Lighting (HCL) and dynamic light color control
- Spatial perception and lighting characteristics
- General and specialized lighting design
- Project implementation and process management
In hotels and spa areas, lighting creates atmosphere, orientation, and comfort. We develop customized lighting design concepts for hotels, suites, holiday apartments, swimming and leisure pools, spa and sauna zones, pools, restaurants, bars, and clubs. Our planning combines aesthetic staging with technical precision and takes energy efficiency, standards, and operational requirements into account. The result is holistic lighting solutions that inspire guests and support smooth and efficient workflows.
Independent evaluation of existing installations and planning services in the field of lighting. The assessment covers compliance with general and specific standards as well as legal requirements, and also examines the rationale and necessity of planned measures. The results are documented transparently and provide a solid basis for investment decisions, renovation strategies, or funding applications.
The planning of emergency and safety lighting requires particular care and expertise. The process begins with an on-site inspection to record local conditions and evaluate both the existing installation and the planning situation. The design is carried out in accordance with DIN EN 1838, including a photometric proof by calculation. In addition, CAD planning, cost estimation, and coordination with specialist planners, contractors, and manufacturers are performed. The objective is to provide a safe, standard-compliant, and cost-effective solution for workplaces, public buildings, and facilities. Actual illuminance levels are verified on site through illuminance measurements conducted in accordance with DIN standards.
Lighting of sports facilities for public use, private venues, or professional operations in accordance with DIN EN 12193.
- Swimming and water sports
- Handball, basketball, volleyball
- Football (soccer), hockey, tennis
- Skate parks and cycling facilities
- Golf, equestrian sports, shooting ranges
The planning of Human Centric Lighting — as described, among others, in DIN 67600 — is based on current scientific findings on the effects of biodynamic lighting with changing color temperature and intensity. The interaction between architectural and spatial planning enables optimal results. Biodynamic lighting not only supports visual performance but also enhances concentration, productivity, and overall well-being. In addition, HCL contributes to error reduction and accident prevention while creating a pleasant atmosphere that actively supports people. This form of lighting design is particularly suitable for offices, educational facilities, healthcare buildings, and industrial environments.
The on-site survey forms the basis for accurate refurbishment and modernization planning. It provides reliable data, ensures transparency, and serves as a solid foundation for subsequent planning and decision-making processes.
Documentation includes:
- Existing lighting installation
- Photometric values (illuminance measurements)
- Power consumption
- Environmental influences (aging, maintenance factor)
- Documented activities and usage purpose
- Planned change of use or adaptation
- Photographic documentation
- Preparation of planning documents
Evaluation:
- Classification and assessment in accordance with relevant standards and regulations
- Advisory on refurbishment or replacement and identification of necessary planning tasks
- Documentation for further processing by subsequent trades
- Comparison of energy consumption
Certification systems assess the quality of the built environment not only in terms of energy efficiency but also regarding health, comfort, and sustainability. Lighting plays a key role in this context — both in terms of visual quality and its biological impact.
In the International WELL Building Institute certification, the focus is placed on people. Criteria such as visual comfort, Human Centric Lighting, daylight utilization, and glare control make a significant contribution to creating a healthy and productive work environment. Professional lighting design ensures that illuminance levels, color temperatures, and light distribution are optimally adapted to the specific use and natural daylight cycles.
The Deutsche Gesellschaft für Nachhaltiges Bauen (DGNB) also considers lighting quality within its sustainability criteria. Well-planned lighting supports compliance with requirements for energy efficiency, user comfort, safety, and environmental protection. By combining efficient lighting technology, precise planning, and intelligent control systems, lighting can make a valuable contribution to achieving certification goals.
Key planning elements include:
- Contribution
to the fulfillment of WELL Building Standard and DGNB criteria
- Daylight
integration and lighting control concepts
- Human
Centric Lighting to support well-being and performance
- Glare
control and visual ergonomics
- Reduction
of light emissions
- Energy
efficiency and CO₂ reduction
- Proof
of compliance through lighting calculations and documentation
- Avoidance of lightemission into noctual environments
Professional lighting design allows certification targets to be addressed strategically, planning processes to be made more efficient, and the attractiveness and value of buildings to be measurably increased.
The result: certified buildings that combine health, sustainability, and economic efficiency.
