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) 

SMBC Nikko Securities Inc. employee Masaki Yamada removes a fluorescent tube as other employees 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) FOR BEST QUALITY IMAGE: ALSO SEE GF2E7C11R3K01 

SMBC Nikko Securities Inc. employee Masaki Yamada works using only a LED desk light, 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) 

Employees of SMBC Nikko Securities Inc. work using only LED desk lights during daytime at the company's 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. Picture taken June 30, 2011.
REUTERS/Toru Hanai (JAPAN - Tags: DISASTER ENERGY BUSINESS) 

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) 

Employees of SMBC Nikko Securities Inc. work using only LED desk lights during daytime at the company's 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. Picture taken June 30. 2011.
REUTERS/Toru Hanai (JAPAN - Tags: DISASTER ENERGY BUSINESS) 

SMBC Nikko Securities Inc. employee Masaki Yamada (R) removes a fluorescent tube as other employees 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) 

SMBC Nikko Securities Inc. employee Masaki Yamada (C) works using only an LED desk light during daytime at the company's 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. Picture taken June 30. 2011. REUTERS/Toru Hanai (JAPAN - Tags: DISASTER ENERGY BUSINESS) 

Employees of SMBC Nikko Securities Inc. work using only LED desk lights during daytime at the company's 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. Picture taken June 30, 2011.
REUTERS/Toru Hanai (JAPAN - Tags: DISASTER ENERGY BUSINESS) 

SMBC Nikko Securities Inc. employee Masaki Yamada removes a fluorescent tube as other employees 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) 

Employees of SMBC Nikko Securities Inc. work using only LED desk lights during daytime at the company's 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. Picture taken June 30. 2011.
REUTERS/Toru Hanai (JAPAN - Tags: DISASTER ENERGY BUSINESS) 

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) FOR BEST QUALITY IMAGE: ALSO SEE GF2E7C11R1W01