First treatment (I am doing this first thing in the morning) for 1/2 hr. It has a
timer, so goes off automatically.

The lights are very "stunning", bright, and peculiar. They are greenish, so the computer screen becomes pink. I did not have any after image issues (there is a warning that severe after images indicate you should see an eye doctor).

However I felt rather uncomfortable, a little headachey, and a bit nauseous at first. It has been 10 minutes off the light, and those feelings have gone away.
I am going to do 8000 level for 1/2 hour all this week. I hope to see some
improvements in my sleep addiction (I have been sleeping an awful lot lately), by then. At this point I cannot imagine doing 12,000 to start with! Also they do not interfere with my glasses at all..that was something I wondered about.

But they are green and somewhat weird. My husband suggests laughingly I should go out at night and walk...he thinks people will stare, and think I am an alien or the equiv. LOLOL

The unit itself when attached to the brim of the visor, is very light weight, and you really cannot feel it.