Lights turned down in Tokyo on blackout warning

TOKYO, Japan - Buildings in Tokyo turn down the lights on March 17, 2011, as part of electricity saving efforts to avoid massive power outages. Left front is JR Shinjuku Station. Power demand in the region has increased due to cold temperatures amid substantial power shortages following a massive earthquake and tsunami which crippled some power plants. (Photo by Kyodo News Stills via Getty Images)