Paperwhite: any way to lower the minimum brightness?

Hi all,

Forgive me if this topic has been covered somewhere, though I have searched high and low:

Is there a possibility of creating a hack that would reduce the Kindle Paperwhite's minimum brightness to virtually no light? When I set the brightness to its lowest setting in the dark it is still painfully bright to me. I'm hoping there's a way to cut it down to virtually nothing (but just enough to read with large font in pitch black..).

Thanks.