I work for a Non-Profit called the International Dark-Sky Association and we deal with the effects of artificial lighting on human health. Research shows that artificial night lighting can cause the body not to produce enough melatonin, which prevents breast cancer. Dr. David Blask did lab research (those poor rats!) on the issue. When he found that rats who had artificial light during their sleeping hours had higher rates of cancer and lower melatonin, some lighting tests were done on women. They basically lit the room up at night and found that women had decreased melatonin levels. Another study done in India checked women working the graveyard shift and there was a much higher rate of breast cancer amongst those women. Out of all of this, we have no idea how much artificial light it takes to decrease the melatonin enough to allow cancer growth, but it’s definitely an interesting topic! Haha I am probably sounding crazy now.

~Teresa
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