Lighted dog collars became possible with the invention of the LED bulb.
Some lighted dog collars produce a light that flows through the entire collar. These collars have settings to produce a slow or quick light flash, or to continually glow.
Other lighted collars like the PupLight2 hold a single, bright, clip-on LED flashlight, which allow the dog and walker to see up to 30 feet ahead.
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