Glowing dog collar works great on short-haired dogs - Nite Ize Nite Dawg Nylon Dog Collar w/ LED Flash or Glow Illumination

I am a professional dog walker and bought 2 collars to walk my black Giant schnauzers and a black border collie at night. It works great for the groomed schnauzers, but became completely invisible under the border collie's fur.
Pros: Makes dog highly visible at night, sturdy construction
Cons: Not for long-furred dogs, not always visible from front/behind

This review was written in the old system and had content requirements that are different than reviews written today.