When the nights are long and days short, getting up for work and coming home again in the dark can be grim. Some of us succumb to the 'Winter blues', leading to increased illness, reduced productivity and feelings of melancholy. Can lighting improve our sleep and lift our moods?
Most people take artificial night-time lighting for granted. In cities, it is considered to be an acceptable component of our society, and many think it is a necessity for safety and security. As a result, illumination levels have increased over the last 50 years by a factor of 10.