Well there is recent research around a 'blue spike' in most LEDs. "nothing to do with human wellness" might be putting it too strongly. See Prof. Glen Jeffery and his work in this area. Note however that this is nowhere near a settled science yet.

https://profiles.ucl.ac.uk/7465-glen-jeffery/publications

I might have put it too strongly. Typical LED light sources might have a strong blue component and might do things like disrupt sleep or other subtler effects. I consider that a shortcoming of how we utilize LED light sources. Filtering the light can fix that.