"Over the last 9 months I have tried a couple of Safety Collar lights. I had purchased the red ones in a bone shape. I went through about 10 of them. They either broke, did not work at all, would not shut off, etc. I bought the Petco one a week ago and it is great. It is smaller (I have a 13 lb dog) but it lights up a lot brighter then the others. I used to use a flashlight at night along with the blinking collar. Now I do not need to have a flashlight because it is so bright. Just need to see how durable it will be over a longer period of time."