2019 also saw the continuation of activities regarding lighting, with widespread use of LED technology, both in motorway tunnels and airports, as well as in buildings, which reduced electrical energy consumption by around 5.4 GWh. As regards air conditioning, modernisation of the systems continued, with more efficient machinery, such as refrigeration units, significant results have been obtained with monitoring and diagnostic platforms that have reduced waste, for a total saving of 3.7 Gwh of electricity.