I agree there's likely a lot of placebo effect going on around this topic. I think there are certain people who are more photo-sensitive and chroma-sensitive than others, however, I suspect it's not a huge percentage of the population. There are also some potentially huge confounding factors making it harder to tease out the practical effect in our everyday lives. As a first-order effect, there's artificial room lighting itself without blue or screen light that's de-blueified. It seems likely that non-blue artificial light is going to have more effect above baseline than the delta between blue artificial light and 'corrected' non-blue artificial light.
The even bigger effect I wonder about is that the screens we look at generally have content and we look at them because that content is engaging our minds and holding our interest. It's often interactive and involves two-way communication. All of those things are going to be highly stimulating to our brains and I think that will likely swamp the effect of removing blue from the artificial light. We already know that reading or watching exciting content is going to make it harder to fall asleep for some time afterward - regardless if it's on a printed page, live or via a screen. Personally, I find that factor to be much larger than any chroma-effect.
I agree there's likely a lot of placebo effect going on around this topic. I think there are certain people who are more photo-sensitive and chroma-sensitive than others, however, I suspect it's not a huge percentage of the population. There are also some potentially huge confounding factors making it harder to tease out the practical effect in our everyday lives. As a first-order effect, there's artificial room lighting itself without blue or screen light that's de-blueified. It seems likely that non-blue artificial light is going to have more effect above baseline than the delta between blue artificial light and 'corrected' non-blue artificial light.
The even bigger effect I wonder about is that the screens we look at generally have content and we look at them because that content is engaging our minds and holding our interest. It's often interactive and involves two-way communication. All of those things are going to be highly stimulating to our brains and I think that will likely swamp the effect of removing blue from the artificial light. We already know that reading or watching exciting content is going to make it harder to fall asleep for some time afterward - regardless if it's on a printed page, live or via a screen. Personally, I find that factor to be much larger than any chroma-effect.