Two things in the settings will help. One is light sensitivity, the other is whether you want the lighting to be linked to the dash lights rheostat or set independently. The time delay you’re describing is a function of light sensitivity, while the night mode brightness being standalone or connected to the rheostat will affect how dark it actually is when you go through the tunnel and then exit. We have our light sensitivity at the standard default setting, but we’ve disconnected our intensity from the rheostat and set it to a brighter setting as it works better that way for older eyes.
We will be happy to hear your thoughts