Illustrative example of the formation and evolution of a 5 M_♃ planet. Left panel: total (blue solid), core (green dash-dotted), and envelope mass (black dashed line) as a function of time during the formation phase. These lines belong to the left y-axis. The solid brown line shows the planetary radius (right y-axis). Right panel: luminosity as a function of time during the formation and subsequent evolutionary phase. The total luminosity (blue solid) and the individual contributions from the internal luminosity (brown dashed), the accretion shock (green dash-dotted), and the planetesimal accretion (black dashed line) are shown.