Here is a video I just shot that fairly accurately shows the brightness settings. I leave it set about half-way. The setting at the end of the video is where I leave it at, and I like it dimmer than most while driving at night. Certainly not going to be an issue with blinding you imo.
[ame="https://www.youtube.com/watch?v=9ACcr-zzKRY"]MVI 5221 - YouTube[/ame]