It is extremely important to have flashlight on your shotgun. You can’t shoot if you can’s see a target. I have tested many flashlights and decided to make a new post. This post has information about old flashlights and new ones.
I was surprised that some of the inexpensive flashlights are really good, reliable and bright. I still prefer Fad Defense Speedlight because of its compact size and brightness but you may choose one of the other flashlights.