Buildings are the largest single energy consumer in Europe, accounting for 40% of energy consumption and 36% of GHG emissions, while lighting for the built environment is responsible for around 50% of a city’s total electricity use. Doubling the building renovation rate from 1.5% to 3% per year, along with energy-efficient lighting retrofits, are indispensable for reaching the Green Deal’s goals for carbon neutrality, energy efficiency, and renewables.