The giant display will monitor the level of happiness among the city's 520,000 residents by showing a number on the scale of one to 10 that reflects tabulated votes sent in by locals from their mobile phones and computers.
The system is already set up and on televisions in the lobby of the municipal office.
"This barometer is a great tool for politicians. If we take a decision and see a sharp fall in the mood of the city, then we know we have done something horribly wrong," mayor Arturas Zuokas said.
This week the barometer has been hovering around six to seven points.
A 2011 poll of global happiness by WIN Association, a network of pollsters, found Lithuania, hit hard by the 2008-2009 financial crisis, among the unhappiest countries of 58 surveyed. Only Serbia, Palestine, Egypt and Romania fared worse. (bdnews24.com)