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Press release: NOTUS energy and Light:Guard sign framework agreement for demand-driven night marking for new plants

21.07.2026

Light:Guard GmbH and NOTUS energy GmbH have concluded a framework agreement for the supply of BNK signals. This includes the equipping of the new systems operated by NOTUS with demand-controlled night marking (BNK).

Light:Guard GmbH and NOTUS energy GmbH have concluded a framework agreement for the supply of BNK signals. This includes the equipping of the new systems operated by NOTUS with demand-controlled night marking (BNK).

The cooperation was signed this week and will run for several years. During this time, Light:Guard will equip most of the NOTUS portfolio with the light:guard system for demand-controlled night marking. These are 21 projects with a total of 83 wind turbines.

Demand-driven or demand-based night marking (BNK) reduces the flashing of wind turbines to a minimum. To do this, the system monitors the airspace around a wind farm. If a flying object approaches, it cancels the suppression of the lighting and the red light flashes as before. Since last year, the Renewable Energy Sources Act (EEG) has prescribed the use of ADLCs on wind turbines.

"We want to be considerate of people and nature with our projects. Accordingly, the BNK equipment of our parks is an important concern for us. With Light:Guard, we have found a reliable partner for this," explains NOTUS Managing Director Hannes Otto.

NOTUS and Light:Guard have been cooperating in the field of ADLS for several years. During this time, a number of existing systems have already been darkened with the light:guard system.

"We would like to thank NOTUS for their trust," says Eileen Hänel, Sales Manager of Light:Guard. "The negotiations were very pleasant and we look forward to continuing the productive cooperation to darken the night sky together."