I personally would not use this if it was available. My solution to avoiding eyestrain was to use [redshift.] 1 This put me in control of what I was subjecting my eyes to and had the added benefits of
A) Virtually immediate gratification for me
&
B) Zero effort required by the site developers for something that as mentioned would appeal to a small subset of users.
There are a number of [alternatives] 2 available. You might prefer [blueshift.] 3