Hi Joe90,
Here's some detail.
Dark glasses work the same as blacked out glasses.
Very light glasses (1/2 brightness) work well, but weaker, all day until stress, pain, tiredness sets in. Dark still works in these circumstances.
I wear very light glasses when out and there not very distracting, and easily explained.
Also, when you've worn them a lot, you can take them off for 2 to 5 hours before adhd starts up again.
I found I could get away with two two hour sessions per day, but I wear them everyday most of the time because adhd is so painful.
I hope I covered it.