Samsung Tab S9 as a light source

Hello,
I am using a Nikon Z8 + Nikon AF-S Micro 2.8/60 mm + Nikon ES-2 for digitising.
I am now looking for a very good light source.
The Kaiser 2454 LED light panel slimlite plano 5000 K is in the selection.
As an alternative, I’m thinking of using my Samsung Galaxy Tab S9. However, I have no idea what settings I need to make on the tablet to use it as a light source. Where can I generate a neutral, white surface and where can I see how many Kelvin it lights up with?
I would be very happy if someone in this forum could help me.
Thank you very much!

Hi there, welcome to the forum. The easiest way is to use an app, there are several, I think I used to use Lightbox but I don’t see that anymore. “Screen Light Color” looks as if it will do it and I expect that Google Play will offer up some alternatives to try.