Not too long super bright but a good faint glow for a couple hours that can be seen at night but couple it with the flashlight and the light comes out all you have to do is hit the sights for a split second while hitting the target and the glow great as you can see from the above photo

It works exactly as I thought it would work. And after running a couple lowlight courses and being pushed to make a little bit longer shots it was really hard to get a site picture without the light directly behind the revolver And even then the shadows made it hard to get a good site picture.

Now when it comes out I pop it with the light as I get my initial target acquisition and I can move the light around and still see the sights as I am illuminating the target.