The majority of the concern here is learning how ***your*** eyes and ***your*** equipment work at night.
You need to spend time in different levels of darkness to figure out how the continually changing environment affects your ability to see a threat, your ability to see your sights, and how much white light you need to use.
Everybody's eyes are different. We all see the world uniquely. I may be able to see much better than you can in the dark or vice versa... as such I may not need as much white light to navigate as you need, or you may need less than I do.
If you make a dedicated effort to familiarize yourself with how your eyes and your equipment work in actual darkness you will begin to get a feel for how much light you need to use in the myriad of lighting circumstances that exist in our environment at any time.
As I've said a number of times you can only get the benefit of this stuff if you actually try it.
Dedicated low light training on a range with quality instructors is the BEST way to accomplish this... but if that isn't an option for you and if you are resourceful and committed enough there are other ways to help develop the skills I've outlined.