NonKonnektionThere are some advantages to using glasses versus software like f.lux, namely portability. For example, you might not be able to install f.lux on every machine you use at work, and you can't install it on a gaming console if you are primarily a console gamer. For a further discussion, check out the video by JayzTwoCents where he reviews a pair of Gunnars (not the brand of glasses in this drop, but same idea).