Comparison of two different planetary masses: a sub-Neptunelike planet of 0.02 M_J (M0.02, green) and a Jovian-like planet of 0.69 M_J (M0.69, blue). The dashed lines and dotted lines represent the cases with and without secondary ionisation, respectively. From top to bottom: fractional ionisation xe as a function of neutral density (a), photoionisation rate Jx_H I (b), and heating deposition rate H (c).