High Quality Content by WIKIPEDIA articles! In the field of physical security, security lighting is often used as a preventative and corrective measure against intrusions or other criminal activity on a physical piece of property. Security lighting may be provided to aid in the detection of intruders, to deter intruders, or in some cases simply to increase the feeling of safety. Lighting is integral to Crime prevention through environmental design. Some people are surprised to learn that security lighting can be counter-productive. Turning off lights halved the number of thefts and burglary in Övertorneå Sweden. A test in West Sussex UK showed that adding all-night lighting in some areas made people there feel safer, although crime rates increased 55% in those areas compared to control areas and to the county as a whole.