Adventure LightsGuardian Hunting Series Dog Collar Light, Blue

The "Hunting Series" is the way to go; they seem to be of higher quality, more durable in terms of being able to attach to multiple sized collars, and comes with an extra battery. The original purchase included one hunting series, one not. The one that was not ended up being returned in favor of another hunting series model. These lights are bright and do the trick. I now have one red, one blue; when flashing most vehicles slow way down.

Let the dogs run around. Was great being able to see where they were at night. Then all of the sudden one of the lights went out. The lens unscrewed and fell off. Now does nothing.They need a better way to turn on and offf so the lens doesn’t fall off.

This beacon is the best way to see where you're bird dog in the field at dusk. When the sun goes down and it's dark out, this will help locate your fur friend faster.

The Blue color is not as bright as the other colors. I recommend buying two of these, one for each side, because when the dog is turned away it's hard to see the light. Their dangling light is much easier see.

Pretty bright, especially if it is pointing right at you. Got a blue one for Sheba and a red one for Cleopatra, two black German Shepard sisters. At night all you can see are the lights.