In 2018, Letter Ingenieros (90%), together with Bettergy (10%), was awarded the Management and Control service of the Barcelona City Council for 4 years. The purpose of the contract is twofold: to be technical assistance in the help of the operation of the control system, as well as to manage and optimize energy consumption. The scope of the contract consists of 2,909 command centres. To emphasize: one of the most innovative systems in which it is working is the dynamic control of luminosity from measurements of light every 15 seconds.