The lack of light is usually thought to affect the mood: it can lead to the condition known as seasonal affective disorder, or winter depression. However, recent studies by North American researchers show that both positive and negative emotions may be intensified by brighter lighting, while lower lighting may dampen those moods. Contrary to popular belief these researches show that depression-prone people actually become more depressed on sunny days.
Other similar correlation measures the effects of different colors of light on human’s mood and behaviour and how these can affect the body in different ways. Read more