Lighting has developed incrementally, over the course of the past fifty years, with very little monitoring or even recognition of its effects. There is consequently very little hard data to confirm its impact. However, it is clear that there are a number of different types of effect. Satellite image of the British Isles at night. 3.2 Effects on People People need and respond positively to light and take it for granted as an essential aspect of daily life.
Lighting is associated both with activity and security.
Most exterior lighting is intended to prolong the working day or allow access to leisure facilities during the darker winter months, and to create an environment which feels safe and secure. Europe at night. However, the cumulative glow of artificial lighting, combined with mist or a polluted atmosphere, may be far stronger than moonlight and may obliterate views to the star-studded night skies. Over the years, people have drawn inspiration from the magical qualities of such views and the transformation of their environment at night. There is concern from a growing number of organisations that these qualities will not be available for future generations to enjoy.