Evolution of various luminosities in model he12p00 under the influence of a constant magnetar power of 10³⁹ erg s⁻¹. The top panel shows the bolometric, ultraviolet, optical, and infrared luminosities from 500 to 4000 d. The bottom panel shows the luminosity in [O I] λλ6300.3, 6363.8, [O II] λλ7319.5, 7330.2, [O III] λλ4958.9, 5006.8, and [Ne II] 12.81 μm (dashed line) together with the total flux (i.e., including all contributing lines) for the associated emission feature at 6300, 7300, 5000 Å and 12.81 μm (solid line). In most cases, overlapping lines are subdominant (i.e., the dashed and solid lines overlap).