Skip to main content


The focus of our projects is on lighting and smart building

People need optimal light to feel comfortable – outside and inside a building. Light and intelligent buildings are unique, special and indispensable. This is precisely why we have been involved for some time in many exciting projects that create awareness for this. Planning, further education, research and development, events and publications are our foundations.


With Lightshift we have developed the platform for professional jobs in the lighting industry. Busy lighting designers can find support for their projects here. If, for example, the right 3D model is still needed for the completion of a lighting design, the right expert can be selected from hundreds and the job completed quickly and efficiently. Of course, lighting designers can also register themselves as freelancers and offer their services worldwide. Registration is free of charge and non-binding.

→  Learn more


The Global Lighting Data Format is a new, modern and modular lighting data format. It not only includes ROLF and ULD, but also supports complex luminaires and sensors, and saves effort in creating and interpreting lighting data. Open and freely available. Developed by DIAL and RELUX.

→  Learn more

Smart Building Design

In 2018, we published our first book on the topic of intelligent architecture with Birkhäuser Verlag.

→  Learn more

Luxmeter App vs. measuring device

There is an app for everything. With this promise, smartphone and app manufacturers want to make our everyday lives easier. There are also numerous offers for the lighting and architecture sector. Of particular interest to us: Luxmeter apps - do they replace a professional measuring device?

→  Learn more

DIAL new building

With the new building of our company we have made a statement: The future lies in intelligent, fully automated buildings that are oriented towards their users. The architecture and overall technical concept were designed in-house.

→  Learn more

Controlling light colour with DALI

When planning lighting control with DALI, the focus nowadays is often on the pure function. Within HCL (Human Centric Lighting) there is frequently a demand for control of the colour temperature of accent lighting with saturated light colours. During the planning phase the user should always bear simple maintenance of the lighting installation in mind. It saves time and money if you can make adjustments yourself. But to do this you need expert knowledge.

→  Learn more

IEEE 1789: A new standard for evaluating flickering LEDs?

It is important in lighting design that there is no flicker and that there are no strobe effects. Visually perceptible flicker is definitely a deficiency. But even flicker at high frequencies which are beyond the visually perceptible range should not be ignored. Studies have shown that this type of flicker can have an influence on the human organism.

→  Learn more

Daylight – is artificial just as good as natural?

We report on the importance of daylight, its colour, dynamics, spectral composition and how daylight is artificially produced. But what do people actually need?

→  Learn more

Efficiency of LEDs: The highest luminous efficacy of a white LED

The efficiency of lamps has increased considerably in recent years with the use of white LEDs in the field of architectural lighting. Retailers claim that we can expect a gigantic leap forward in luminous efficacy. Such claims cannot be taken seriously. What does luminous efficacy depend on and how efficient can a white LED actually be?

→  Learn more

No glare from artificial light: What is behind the UGR method

What is the UGR value? Where is it required and used? We also inform you about the limits of the tabular method that determines the UGR value. And why is the UGR value given as a number in the luminaire data sheet?

→  Learn more