A reporter tests a device that measures ultraviolet (UV) light levels so that users can keep track of their sun exposure. The device, called the Oregon Scientific Portable UV Monitor, is a $35, 3-inch monitor that calculates UV light levels from a range of 0 (very low levels) to 25 (extremely high levels). But after testing it on the beach, the reporter was not sure the device was helpful in determining the safest amount of time to stay out in the sun.
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