Exposure to light at night does not increase breast cancer risk, major new study suggests - The Institute of Cancer Research, London

The prospective analysis of 105,866 women provides evidence against the 40 year old proposal that night-time light levels and breast cancer risk are linked.

Harvard study strengthens link between breast cancer risk and light exposure at night

Special glasses may reduce sleep-disrupting effects of smartphones, study suggests, The Independent

Could outdoor light exposure at night heighten breast cancer risk?

Environments, Free Full-Text

Daylight heals, night light steals: The surprising link between light exposure and mental health

Outdoor light at night linked with breast cancer, News

The metastatic spread of breast cancer accelerates during sleep

Exposure to light at night (LAN) and risk of breast cancer: A systematic review and meta-analysis - ScienceDirect

Light-at-night exposure and the risk of female breast cancer in England, Faculty of Medicine

Light at night and the risk of breast cancer: Findings from the Sister study - ScienceDirect

Light at night and risk of breast cancer: a systematic review and dose–response meta-analysis, International Journal of Health Geographics

Morning people may have a lower risk of breast cancer, says study