"The risk of breast cancer is statistically significant for women who work night shifts in textile factories." Frank said. "It's the high color, warm white light that's used on the textile factory floor."
Similarly, the weekly US News and World Report has also reported on the problem of light pollution caused by high color and warm white light. "It's very important to know what's going on," said Dr. Richard M. Rosen, an epidemiologist at the University of Connecticut Health Center. Dr. Stevens's team published a study showing that breast cancer rates were nearly twice as high in areas with bright lights as in areas that were dark at night. Research has also shown that exposure to white or blue light at night can affect hormone production, disrupt circadian rhythms and promote the formation of tumours.
Zhang's white light is rich white light and white light is not rich white light, on the human body is mainly rich blue white light. No matter outdoors or indoors, be sure to use not rich blue white light, low color temperature white light. Less blue light, or blue light is converted to red, yellow or green light, such a light source can be used to ensure that human health does not cause harm.