Comment If you can't tell they're blueblocking, of course (Score 1) 36
If you can't tell they're blueblocking, of course the impact is going to be negligible. You want ones where if you shine a bright, pure blue LED at it, all you see is a slight mist of green—safety goggles.
It is a good point about the relative brightness between the sun and the screens we see, as the way our brain tracks light for adjusting our sleep is basically a photon counter: the relative light (i.e. the screen is much brighter than the surrounding environment) doesn't matter, the absolute amount does. With that said, I wonder how much pupil dilation effects how much light actually makes its way in in either scenario (screen at night vs. being outside during the day)
I wouldn't wear them unless you have actual sleep problems, or are trying to pre-transition your sleep cycle to match the destination of a trip, though.