Interaction-powered light curves for model B12.3p25.1 assuming a constantly expanding CSM (left panel) and a CBD-like CSM (right panel). A comparison of the two approaches with different explosion energies is shown in the center panel. In each panel, two observations are shown, namely, the Type Ibn SN OGLE-2012-SN-006 (Pastorello et al. 2015a, light-blue scatter) and the Type Icn SN 2019jc (Pellegrino et al. 2022b, orange scatter) as well as the template light curves for Type Ibc SNe (Nicholl et al. 2015, in violet, where the peak is located at the same time as in the light curve of model he4 from Dessart et al. 2020) and Type Ibn SNe (Hosseinzadeh et al. 2017, in blue, where the peak is arbitrarily placed at 10 d). Left: The CSM is assumed to constantly be expanding at v_CSM = 10 km s⁻¹, with different opening angles (with different colors) and with E_{kin, ej} = 6×10⁵⁰ erg. For θ = 90°, models with v_CSM of 5 km s⁻¹ (dotted line) and 20 km s⁻¹ (dashed line) are also shown. Center: Interaction power from the CBD-like CSM (solid, with R_in = 10¹³ cm, R_out = 10¹⁵ cm, and s=−1) and a constantly expanding CSM (dashed, with v_CSM = 10 km s⁻¹) are shown with different E_{kin, ej} (different colors), assuming an opening angle θ = 10°. Right: The CSM is assumed to be CBD-like, with R_in = 10¹³ cm, R_out = 10¹⁵ cm, s=−1 and different opening angles (different colors). For θ = 5°, the cases with s = 0 (dashed) and s=−2 (dotted) are also shown.