Today it takes a lot of coal, natural gas, wind, solar and other energy sources to power lights around the world. The good news is lighting is getting more efficient and consuming less energy; the bad news is more lighting is being added every day. The move from incandescent light bulbs to compact florescent light bulbs is helping reduce energy use and greenhouse gas emissions, and LED lights will accelerate those savings in the not-too-distant future.
At Walmart, that future is now. Because electricity is the number two operating expense in almost every one of our stores and clubs around the world, we have been focused for decades on efficiency and reducing energy use, particularly from lighting.
Source:
TreeHugger
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