Very glad to see this thread! I'd saved off a pair of blue-light filtering glasses in my Amazon wishlist, but as they are $45, I hadn't managed to make myself pull the trigger. I use my tablet a lot at night and use it as an e-reader as well, so I am very happy to hear about f.lux. Much cheaper than the glasses! I am going to download and give it a try.

I can always count on the wealth of information in this group. Thanks for being there!