Evolution of the B-band rest-frame light since z ~ 0.8. The local results at a redshift z ~ 0 are taken from Tasca & White (2011). Filled red circles and blue triangles represent the whole B-band rest-frame light in the bulge and disc components. The empty stars and squares stand for the pure bulge and the spheroid populations, while the empty triangles are for bulgeless galaxies and the disc components of spirals. The lines help to guide the eyes.