*Lighting in the Classroom*

• Classroom lighting and energy saving

The problems generated by the excessive consumption of fossil fuels and their effect on the fragile balance of our planet are well known, and a reduction in expenditure due to a decrease in energy consumption would allow countries to use these funds for the health or education of their inhabitants. Therefore, the reduction of energy consumption must be a priority for all public administrations, both for the savings it would entail and for the reduction of emissions of polluting gases [79,82,88,89].

In recent years, publications have appeared on studies and proposals for new parameters for cataloging buildings (IEQ), for specific data analysis of the parameters to be studied (CDBM), and on different parameters for obtaining more specific data, taking into account variables such as the amount of light at each time of day and season (DF, DA, UDI, DAcon, UDI-e, UDI-f, UDI-s, UDI-a, UDI-c) [72–75,79].
