THE INSTAWIFE HATES ALL THOSE GLOWING DIODES: Too Much Light At Night Can Lead To Depression. “Here’s another reason to log off at a reasonable hour: exposure to dim lighting at night — such as that generated by a TV screen, computer or night-light — may lead to depressive symptoms, new animal research suggests. . . . Mood disorders are by no means the only health condition linked to artificial lighting and screen time at night. Earlier this year, the American Medical Association (AMA) put out a disturbing summary of adverse health effects from nighttime lighting, noting that artificial lights disrupt circadian rhythms and alter the body’s normal hormonal responses. In particular, when people spend too little time in darkness, it seems that the body suppresses release of the hormone melatonin, which — among other things — is thought to fight tumor growth and cancers. Other health conditions affected by changes in circadian rhythms, according to the AMA report, may include obesity, diabetes and reproductive problems.”