There was a brief discussion on Facebook wherein the OP was looking for a way to brighten his acoustic tone, and one common suggestion was to use 80/20 over phosphor. This left me scratching my head because for years I have been using strictly 80/20 because they were darker. I've had two of my own guitars and one of a friend's undergo the the transition, and it has been the same every time. 80/20 is notably darker. In the case of my friend's guitar, they were actually so dark that he turned around and bought a set of phosphors and changed them out the next day. My guitar now has a set of phosphor Elixir nanowebs only because I had it lying around and figured I'd not spend the $13 for another set. I thought it might be nice to change it up a little bit anyways, and upon completing the swap my guitar was obnoxiously trebly, and my wife can attest to that. I wished that little L.R. Baggs tone control worked on unplugged guitars too. Now 2 months later, they finally sound like 80/20s again....perhaps with a tiny bit of exaggeration. So why has my experience been so different than what seems to be the consensus from everyone else? Am I applying the wrong definition to "bright?" Does "bright" in guitarist terms have more to do with clarity than frequency emphasis? What am I missing here?