I have been using the Tracker Dog Safety and Locator Light for well over a year on my black lab Rita. I keep it on her collar straps all the time, and find it very useful to keep track of her when heading to water fowling spots before first light and while setting decoys ( we all know how labs love to go “investigating” will we’re distracted). Also, I turn it on every time I let her out for a quick run after dark. Instead her immediately disappearing into the darkness, I can visually keep track of her.
These lights are very durable and will seemingly last for years. They can be set to “constant on” mode, or to flashing mode by simply flipping the battery, which results in about three times the battery life, plus an extra battery is included with the light. The guys who run hounds at LCS use them as well, and they last for them as well. They are waterproof, virtually indestructible, and one of the best values in collar strap lights we offer. If you need a locator light, I highly recommend them.