Luminosity as a function of time after formation for planets with total masses of 1, 2, 3, 5, 7, 10, and 12 M_♃ and core masses of 20, 33, 49, and 127 M_⊕ as indicated in the panels. The colored solid lines assume cold accretion. The dashed-dotted gray lines assume hot accretion. The points with error bars are young giant planets (from top to bottom: 1RXS1609 b, Beta Pic b, 2M1207 b, HR8799c,d,e, HR8799 b).