A Brother's Guiding Light is a progressive rock band known for their complex compositions and intricate harmonies. The band comprises of the Miller brothers, with Sam on vocals and guitar, and Luke on drums, who have been the driving force behind their distinctive sound since formation in 2002. Their 2010 album, "Lighthouse in the Abyss", is often cited as a seminal work in the genre, featuring a blend of layered guitar work and rhythmic complexity. Their contribution to the progressive rock scene has significantly influenced emerging artists within the genre.