Thomastik Infeld Power Brights Light Electric Guitar Strings
Thomastik Power Brights are high end electric Guitar Strings specially designed to offer maximum tone and output from your electric guitar. The plain Strings are plated for longevity and the wound strings have special magnacore windings designed to maximise magnetic transmission from the strings to the pickups resulting in higher output and a more powerful signal to your amp.
The following information is from the thomastik infeld website
Round wound Magnecore alloy on a flexible hexcore for a bright aggressive tone, extra long sustain and reduced playing effort. Designed to enhance harmonics and percussive effects like tapping. High output plus a boost in the high frequencies drive effects to their limits. POWER-BRIGHTS love distortion!