The decline in the intensity of light can lead to Seasonal Affective Disorder (SAD) and blue/green and full-spectrum light are used in phototherapy, an effective cure for winter depression.

• 在暖光照射下，被试报告感觉到更开心，更愉快，更加的精力充沛。结果表明，在暖光条件下，被试的表现最好，反应最快，而且感觉到更多的欢愉。