Yes, I'm somewhat bright, thank you...
Oh, wait. Strings. Um, yes, the Roto's are pretty bright, almost roundwound-ish. Fender 9050's are also pretty bright for flatwounds, as are D'Addario Chromes. It's a different sort of brightness than rounds, i.e., they don't sound like rounds, but they definitely have some upper mids and highs.