How do you measure the life of a light source that could last decades? (Photo: Shutterstock)
It turns out the reason is simple, but has a little bit of back-story attached. Unlike Energy Star certification for other types of appliances, an Energy Star-certified LED light bulb signifies reliability and performance as well as energy-saving performance. The reason for the difference is down to the problems faced by ordinary people when compact fluorescent bulbs first appeared.
"Originally, the Department of Energy was very concerned about what happened with compact fluorescent lighting when it first entered the market in that there were all kinds of variations of quality, reliability and performance," Gary Rosenfield, EVP of Marketing & National Accounts at Switch Lighting told Gizmag. (Though the lighting aspects of Energy Star now fall under the jurisdiction of the Environmental Protection Agency, when it came to specifying Energy Star criteria for LED products, it was the DoE.)
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