"We provide the first experimental evidence showing that brightness appears to heighten the salience of morality to the individual, thereby leading people to perform ethical deeds," said researchers from National Sun Yat-sen University, Taiwan. "We suggest that brightness may enhance the self-importance of morality and thereby increase ethical behaviour," they added.

The researchers carried out a series of experiments with three levels of brightness under 12, eight, and four fluorescent lights, 'The Independent' reported.
In one experiment, men and women were told they were playing a game which involved sharing money between themselves and a stranger said to be in another room.  Those in the brightest room offered around 15 per cent more of the cash than those in the moderately lit room, and around 30 per cent more than the people in the dimmest room.

The researchers calculated an 85.2 per cent honesty rate for people in the well-lit room, 70.4 per cent for those in the moderately lit room, and 51.9 per for those under dim lighting.

The study was published in the Journal of Environmental Psychology.


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