Energy saving light bulbs (i.e. not lamps with values of mercury which, according to the energy qualification system developed by Hera Luce on the basis of the Minimum Environmental Criteria, belong to class G) are used at managed, class A+ light bulbs are used at 5% of the light points managed, while at 53% of the light points there are management systems in place to optimise consumption (reduction of intensity, partial switching off etc.).