Exposure to bright light at night can disrupt the internal clocks that make our various circadian cycles tick. Such cycles affect behavioral rhythms, daily changes in blood and urine chemistry, and the production of melatonin, a hormone involved in wake/sleep cycles and body-temperature fluctuations that is produced at night by the pineal gland. Connected by nerves to the eye, the pineal gland is very light-sensitive, and sudden or continuous exposure to a bright light can suppress the production of melatonin. In the short term, the disruption of biological rhythms can produce grogginess, depression, and impaired thinking.
– Via The Dark Side of Light
Every one’s heard of Earth Day but what about Earth Hour? Earth Hour takes place on Saturday, March 19 (8:30-9:30PM)
Of course, a wee hour in the scheme of 24 hours is a drop in the bucket one could say; however, think beyond just flipping a switch “off” for 60 minutes. For us city folks we are constantly bombarded by lights – during the day (office, school, shopping) and at night. Not only is our excessive energy use bad for the welfare of the planet, but, did you know that too many lights (aka light pollution) could be bad for your health? Studies have show that lights and glow of modern technology devices are can make you ill.
Humans once spent their nights in relative darkness. No longer. When the sun sets, TVs, computers, mobile devices, and artificial lighting burn on. The May issue of the Harvard Health Letter reports that this aspect of modern life may be great for efficiency, but not for health. At night, light throws the body’s biological clock—the circadian rhythm—out of whack. Sleep suffers. The combination of poor sleep and exposure to artificial light exposure may contribute to a number of health problems. Read full article>
Let’s power down and unplug for the health of the people and the planet.