Bolometric and multiband light curves for He-star explosion models he3p30, he6p00, he8p00, and he12p00 covering from 100 to ∼4000 d after explosion (clumping is ignored in these four models). A constant magnetar power of 10³⁹ erg s⁻¹ is introduced after 250–500 d, depending on the model, and becomes the dominant power source beyond about 700 d. Light curves at early times, prior to magnetar power injection, are taken from Dessart et al. (2023b). [See Section 3 for discussion.]