Skyline
Enlightened
I honestly don't think any bright light will stop a dog who is intent on biting you. I certainly wouldn't count on it. Best bet would be to avoid situations where you might get bit.
However, I do have an anecdote related to this. My neighbor keeps 4-5 dogs in her fenced backyard, and anytime I'm out in my yard, a chorus of barking erupts. Very annoying. One time at night I flashed/strobed my 6P (P61) in one of the dog's eyes. After a few seconds, the dog stopped barking, and soon after that, turned his head away. It seemed to bother him, especially since it was night. I think strobing the light helped too.
Also, I have no doubt that using a M6 would definitely make a dog turn his head away. It's that bright.
/mel
However, I do have an anecdote related to this. My neighbor keeps 4-5 dogs in her fenced backyard, and anytime I'm out in my yard, a chorus of barking erupts. Very annoying. One time at night I flashed/strobed my 6P (P61) in one of the dog's eyes. After a few seconds, the dog stopped barking, and soon after that, turned his head away. It seemed to bother him, especially since it was night. I think strobing the light helped too.
Also, I have no doubt that using a M6 would definitely make a dog turn his head away. It's that bright.
/mel