Executive Summary Electric light enabled us to conquer the night, but it has come at a significant cost to human health. Over the past 20 years, excess blue-rich light exposure at night, and too little light during the day, has been linked to dozens of serious health disorders caused by circadian rhythm disruption, including sleep disorders, depression, obesity, diabetes, cardiovascular disease and several hormone sensitive cancers including breast and prostate cancer.
More than 20 years of scientific research reveal that exposure to blue-rich light in the evening and at night increases the risk for certain types of cancers. The subject was further explored in 2007 by the International Agency for Research on Cancer (IARC) and the World Health Organization (WHO), which revealed that shift work that impacts natural circadian rhythms is “probably carcinogenic to humans.” Further exploration of the 2007 findings revealed:  Breast cancer increased 32% - 58% in women regularly exposed to light at night. Prostate cancer increased up to 200% in men regularly exposed to light at night. Blind…
More than 15 years of scientific research show that exposure to blue-rich light in the evening and at night increases the risk for cardiovascular disease by as much as 40 percent for night shift workers.Most energy efficient LEDs in the market today are rich in the blue wavelengths that at night trigger the metabolic processes involved in hypertension, atherosclerosis, and cardiovascular disease through:1.) Disruption of the circadian system (phase shifting and circadian misalignment)2.) Melatonin-suppression and phase shifting
Groundbreaking Evidence Shows Light at Night Increases Risk of Obesity and Diabetes
The health risks of light at night. The Good, the Bad, and the Time of Day of Bioactive Blue Light. THE CHALLENGE Edison’s invention of the light bulb conquered the night, or so we thought. Now, the night seems to be striking back. On almost a regular basis, we see headlines extolling the harmful effects of artificial light at night. “Your smartphone is making you fat!” says one headline. “Light at night is contributing to the diabetes epidemic and increases your chance of heart attacks!” says another. “Working at night increases your chance of getting breast or prostate cancer by over…


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