The city of Differdange in Luxembourg is beginning a significant public-lighting infrastructure overhaul, replacing all 1 711 existing conventional and older LED luminaires with smart controllable LED units over the next three to four years. The total investment is set at around €3 million.
The current lighting stock, though representing only 57 % of the municipality’s fixtures, accounts for 82 % of its public-lighting energy consumption. Under the new system, annual energy use is expected to fall from approximately 962.78 MWh to about 313 MWh, a reduction of 67 %. This drop corresponds to an estimated CO₂-saving of 365 tonnes each year.
Residents are to benefit from more uniform lighting, better colour and detail perception, and an adjustable intensity according to actual needs. Maintenance costs are projected to decrease by 40–50 % thanks to the longer lifespan (around 25 years) of the new LED technology. The choice of warm-white LED lighting is also noted to attract significantly fewer insects, reduce light-pollution at night, support ecosystem health and help improve sleep quality.
While the vendor or system-provider details were not specified in the announcement, the municipality emphasises the large-scale impact of this retrofit and its alignment with broader energy-efficiency and smart-city goals.
