Itzhacki J, Te Lindert BHW, van der Meijden WP, Kringelbach ML, Mendoza J, Van Someren EJW
Emotion (Washington, D.C.); 10.1037/emo0000402
Several studies demonstrated effects of light on affect via projections from the retina of the eye to the circadian clock or via projections to areas involved in mood and reward. Few field studies investigated how naturally fluctuating light levels affect positive and negative mood in everyday life, but none addressed two key components of the reward system: wanting and liking. To elucidate diurnal profiles and immediate effects of dynamically changing light intensity in everyday life, subjective wanting and liking were assessed using experience sampling, while continuously monitoring environmental illuminance.