Employees of SMBC Nikko Securities Inc. work using only LED desk lights, during daytime at the company office in Tokyo June 30, 2011, a day before a target to cut electricity use by 15 percent in regions affected by Japan's March 11 earthquake and tsunami takes effect. The cuts are aimed at helping avoid power blackouts during the peak summer demand period amid efforts to restore generating capacity lost in the disaster. REUTERS/Toru Hanai (JAPAN - Tags: DISASTER ENERGY BUSINESS IMAGES OF THE DAY)