Make the laptop screen even darker?

Can I make the screen on my Windows laptop even darker than it actually is?

Windows 10 offers a night mode. The color of the display will be adjusted a bit.

If that doesn't help, I recommend a privacy film that restricts the field of vision to the side of the display. The film then also swallows a lot of brightness.

I have fitted around 20 monitors and laptops with such a film. With older displays, the loss of brightness can hardly be compensated, so that no film was an option for them.

The privacy film can be found on the net for 20 to 30 euro.