I will say that when I’ve tried it, it’s REALLY bright. It’s one of those things that you think—hey, it can’t really be this easy to change your mood, can it? But then I read about this study: In summary, if you put a poster of eyes over an honor-system collection bowl like at a coffee station, people are THREE TIMES more likely to contribute. This, even though people consciously knew that they weren’t more watched when the poster was present.