Found a great tip on one of the forums for changing your laptop screen to Red.
It's called Red Screen - just download to your computer and you can turn it on and off, increase or lower the red. I have put it on my desktop to see if it's any good, but the red is a bit bright, but I am sure if you put it on your laptop, you can turn the brightness down.
I am going to put it on my laptops as one of them I have a job to fix the plexi glass on. Also useful for a back up if you forget your plexi glass.
http://www.astrodigital.net/download/redscreen_windows/redscreen_windows.html
Carole
I installed it some time ago but didn't really like it. Not all apps look good with the red screen switched on and just as you say, it is a bright red. But it's OK for an emergency.
Mark
Yes I put it on one of the laptops today and turned the brightness down. I guess it is handy to have it installed if you forget your red plexi glass.
Carole