The Sunwayman T20C is an every day carry (EDC) light on steroids. Normal lights which are similar to the T20C don’t even come close in terms of output. The T20C uses the big CREE XM-L LED which pushes out 438 lumens on max brightness. That is close to 500 lumens coming from a light that is more than small enough to fit in your pocket. The T20C uses two CR123 lithium batteries which provide long run time while without making the light bigger and heavier. Having a light with this much output isn’t always necessary, but it is nice to know that you have it in case the need arises. I think lights like this will become fairly common in the future, but as of now the T20C is one of few with this kind of performance in this small of a package.