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.
Breast cancer risk higher in western parts of time zones; is electric light to blame?
Harvard study strengthens link between breast cancer risk and light exposure at night
The Negative Impact of LEDs on the Environment and Health
Breast cancer risk increase with exposure to outdoor light, study says
Frontiers Light at night exposure and risk of breast cancer: a meta-analysis of observational studies
Dementia: Shorter telomeres on white blood cells may increase risk
Exposure to light at night does not increase breast cancer risk, major new study suggests - The Institute of Cancer Research, London
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Alcohol and Cancer Risk Fact Sheet - NCI