Frequently asked questions
about retrofitting
Retrofitting existing luminaires with LED technology is a more sustainable and often more cost effective alternative to full replacement. Characteristic luminaires are retained and upgraded to current technology. This approach conserves resources, reduces CO₂ emissions, and preserves the identity of public spaces.
Retrofitting also enables the targeted use of modern lighting technology. Precise optics reduce light spill and light pollution. Warmer color temperatures support nocturnal wildlife and help protect natural rhythms.
In many cases, retrofitting requires less time than full replacement and significantly reduces material use and costs.
Upgrading existing luminaires reuses existing components such as high quality stainless steel or cast housings. This reduces material demand, lowers emissions from manufacturing and transport, and minimizes unnecessary waste compared to new installations.
Energy savings depend on the specific starting conditions and project goals. Key factors include the type of light sources installed, operating hours, and priorities such as maximum savings or visual comfort. A reliable assessment therefore requires a project specific analysis.
To illustrate the potential, we can refer to a practical example from Stockholm, where energy savings were calculated as follows:
As shown, conventional luminaires with an average of 60W per luminaire were used. These included compact fluorescent lamps at 42W and metal halide lamps at 70W. After retrofitting with Selux Tritec modules, energy consumption was reduced by approximately 58 percent. Additional night time dimming between 23:00 and 05:00 reduced total annual electricity consumption by around 20 percent. The project did not prioritize maximum energy savings. Instead, it focused on a balanced relationship between visual comfort, atmosphere, and efficiency.
Yes. Selux solutions can meet the requirements of government funding programs such as the National Climate Initiative of the German Federal Ministry for the Environment. They qualify as professional system retrofits.
Selux retrofit kits differ from standard retrofits that are not eligible for funding. They significantly improve energy efficiency and meet technical requirements for light quality and controllability.
Tritec technology is a modular system for (decorative) luminaires up to 5 meters in height. It is available in two variants:
›Tritec Sky‹ provides precise light control without stray light. It helps protect natural environments and the night sky.
›Tritec Ambiance‹ creates a bright and airy atmosphere. It increases vertical illumination and produces soft transitions with illuminated façades. It is well suited for city centers, historic streets, and lively public spaces.
Both variants are available in different light colors and reflector finishes. They are also cost effective for smaller quantities.
The Gen5 module is a high performance retrofit solution for large scale pendant luminaires. It delivers luminous flux of up to 15,000 lumens. The lenses are made of optical silicone, which ensures high durability and excellent light transmission. This makes the module suitable for long term outdoor use.
Depending on the retrofit kit, Selux offers a range of symmetric and asymmetric light distributions, including Tritec options such as “asymmetric street” and “asymmetric street with sidewalk.” These distributions minimize light spill and actively reduce light pollution while ensuring compliance with the required lighting classes defined in DIN EN 13201.
Each project begins with detailed planning. Selux works with the client to analyze the existing installation and evaluate luminaire types. Based on this analysis, a tailored modernization concept is developed. Technical and design requirements are considered together to achieve a balance between energy efficiency, visual comfort, and atmosphere.
LED retrofitting offers more than energy savings. The use of precise optics such as ›Tritec Sky‹ reduces light pollution and limits the impact on natural environments and the night sky. Warm colour temperatures such as 2,200 K or 2,700 K are less disruptive to birds and insects than cool white light. As an optional feature, ›Circular Light Profiles‹ allow dynamic adjustment of light spectrum and intensity. This supports the needs of both people and nature.
›Circular Light Profiles‹ developed by Selux are based on scientific principles. They adjust the light spectrum according to time of day and season. The blue light component is reduced in a targeted way. This reduces disturbance to insects and birds compared to conventional lighting while maintaining safety and visibility.
Yes. With an optional Zhaga interface, retrofitted luminaires can be connected and integrated into lighting management systems. This enables precise control, flexible dimming, efficient asset management, and simplified maintenance.
Yes. Selux retrofit kits can be equipped with the Zhaga hardware standard. This allows integration with common lighting management systems such as DALI, Dyna, or HNS. Cities and municipalities remain independent of specific manufacturers and are well prepared for future requirements.
Selux retrofit kits are designed for efficient installation. In many cases, full installation can be completed within minutes as part of routine maintenance. This is made possible by mechanical interfaces that are precisely matched to the existing luminaires.
Yes. Selux retrofit kits are independently tested and certified products. Unlike simple lamp retrofits, where the installer may assume the role of the manufacturer, technical responsibility remains with Selux. We recommend verifying CE conformity on a case by case basis.
Reference projects include Berlin with gas replacement luminaires, Hamburg with Tritec Ambiance, Salzburg with Flex Kits, and Amsterdam with canal luminaires. These are just a few examples from a growing portfolio of completed retrofit projects. Explore our references to see more.