Many behaviors influenced by changing light from night to day and the seasonal increases of longer days involve hormones. Hormones regulate growth and immune functions. But they re not produced all the time. If they don t shut down, you overload the body. It can t get rid of them.
Hormones are toxic in the wrong amounts.
Indeed, a 1998 study at the Mary Imogene Bassett Research Institute in Cooperstown, New York, found that cancerous liver cells in lab rats grew rapidly when they were constantly exposed to light. You can help turn down lighting s environmental impact Lights Out Turn off lights whenever you leave a room. Close window blinds at night to prevent lights from shining outward. Turning off a few lights makes a big difference in conservation. Buy Design Use lights that have shields on their tops or sides so that they illuminate only where they re supposed to.