One store in Guatemala City after LED lighting installation (before is below), photo: Walmart Stores The following is a guest post from Charles Zimmerman, vice president of international design and construction at Walmart. 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 f… Read the full story on TreeHugger
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Lighting the Future: Walmart Converting Hundreds of Stores’ Lot Lighting to LEDs