That front sight can be mighty hard to see in the wee hours of the morning, or in the late evening, even when you can see a deer clearly. That's especially true with a peep sight. And fiber optic sights don't work for my eyes. But this does, and very very well.
I paint the front sight with White-Out correction fluid. It scratches off easily with a fingernail when I want it gone.
Then I secure a fishing bobber light to the barrel a few inches behind the sight with black electrical tape. It's easily attached and removed.
This is what it looks like with the light turned on.
The light and tape are stored on a piece of scrap plastic and go in my pocket when not needed on the gun.