Conclusion of [2]
"If you are a night owl, you might be better off with a tablet, but if you are a daytime reader who prefers reading outside in the Sun, then a reflective e-reader or a physical book is a better option.
Other than that, there is no difference between the two screens."
Professor Michael Young, Michael Rosbash and Jeffrey C. Hall won a Nobel Prize for research in this area in 2017.
[1] https://www.nobelprize.org/prizes/medicine/2017/press-releas...
[2] https://bubblin.io/blog/daylight-energy-fatigue