Even camping lanterns are going green. Rather than burning camp fuel, camping lanterns from Favour Light Enterprise Ltd. of Dongguan, China, illuminates campsites with low-power LEDs powered by batteries. Favour, one of the largest flashlight makers, employs Crees XLamp XR-E power LEDs for camping lanterns and numerous flashlight models. The white Cree XR-E LEDs produce typical luminous flux of 80 lumens at 350 mA, yielding 70 lumens per watt.
With erupting concern over police brutality, law enforcement agencies are turning to body-worn cameras to collect evidence and protect police and suspects. But how do they work? And are they even really effective?
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