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Some colored lights contain lead

While LEDs consume a fraction of the energy of incandescents and last exponentially longer, some colored LEDs may contain lead, according to Potential Environmental Impacts of Light-Emitting Diodes, a new study by UC Irvine published in the peer-reviewed journal Environmental Science and Technology. The study tested low- and high-intensity LEDs in red, yellow, green, blue and white. Low-intensity red LEDs, commonly used in Christmas lights and traffic applications, contained eight times more lead than California law allows, the study found.

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