Pedestrians pass an illuminated sign for the Metro subway system on the Champs-Elysees in Paris, France, on Saturday, Dec. 15, 2012. The French minister for energy and environment unveiled a proposal for lights in and outside shops, offices, and public buildings -- including the flagship Louis Vuitton store and the Lido cabaret house on Paris's Avenue des Champs Elysees -- to be turned off between 1 a.m. and 7 a.m. starting in July. Photographer: Balint Porneczi/Bloomberg via Getty Images