This Could Be The Real Reason You’re Struggling To Drift Off At Night
“Light during the day – especially in the morning – advances your clock, so you get tired earlier in the evening, but light exposure late in the day or early night will delay your clock, pushing back the time that you will feel tired,” said de la Iglesia.
Article source: https://www.huffingtonpost.co.uk/entry/morning-sunlight-impacts-sleep-study_uk_6398b12fe4b09e0de4971e64