Maybe we were better off in the dark?
Shortness of Dark - the woes of an artificially lit world:
The evidence that artificial light strips us of some of our well-being is not conclusive, but it is concerning. If you must stay awake during the night, it may be prudent to leave the lights out, and allow the pineal gland to do its work. So far, studies on the effectiveness of artificially-administered melatonin have shown mixed results. In any case, a regular dose of darkness may be the best preventative measure against becoming a stressed-out, constipated, ulcer-riddled cancer patient.
This is why I always blog in the dark, with the monitor off, and the reason you should never pick on me for my many typos.