Hersted Industrial Park has been transformed into a national and international testing centre for the latest technology in LED street lighting and smart city technologies. Twelve kilometres of road present more than 100 different solutions. The brains behind the project are Albertslund Municipality, the Technical University of Denmark’s Department of Photonics Engineering and the company Gate 21. Since opening, DOLL has received visits by more than 70 municipalities across the country seeking advice on which solution is best for them. Because many municipalities have not invested in lighting for over 30 years, they have not kept abreast of the latest technologies. At DOLL, decision-makers learn that street lighting is no longer merely lamps but also advanced, energy-saving IT systems that ensure high quality lighting. The final savings have yet to be calculated, but Albertslund has already modernised the lighting on many public roads, resulting in significant savings.