The issues of interior lighting on the example of an educational building adjustment to nZEB standard

Improvement of energy efficiency in buildings is the goal of many activities around the world. In recent years a need to increase the number of buildings, which not only fulfil the minimum energy performance requirements, but have very low energy consumption and are environmentally friendly has been recognised. In this paper the issues of electric lighting quality in educational buildings, focused on the analysis of lighting energy efficiency are presented. A brief characteristic of the selected educational building and requirements for the assessment were presented. The lighting conditions in selected interiors of the building and the lighting energy efficiency in the whole building were evaluated. To demonstrate the opportunity to improve lighting conditions and energy efficiency, four solutions for each selected interior were proposed. New fluorescent and LED lighting solutions were compared in detail. The comparison between the existing lighting and new solutions was conducted either. The lighting in evaluated building was not energy efficient and what worse, the lighting conditions in many interiors were much below the requirements. Introducing new lighting solutions should improve the quality of luminous environment in interiors and reduce substantially the lighting power installed as well as the energy use in the building.