I learned today that people are less honest when they are in darker surroundings. We are even more likely to lie in situations where our identity is clearly known (such as email, phone, or with loved ones)when we are in a dark room. Check this out! http://news.yahoo.com/s/livescience/20100301/sc_livescience/darknessbegetsdishonestystudyfinds
Now I don't know if I buy it, but I can tell you that it made me question just enough that I actually got up from my desk and flipped the lights on.