Equilibrium temperature as a function of the Bond albedo, A_B, and the recirculation factor, f. Since WASP-80 b is a warm gas giant, it is expected to distribute its energy at least uniformly across its dayside (f = 2) or, at best, across its entire surface (f = 1). The retrieved dayside brightness temperature is plotted in black. The median value is shown by a solid line, the 1σ confidence region is delimited by dashed–dotted lines, the 2σ region by dashed lines, and the 3σ region by dotted lines. The gray dashed lines represent the technically possible 1σ limits on A_B (0.113 < A_B < 0.691), while the white dashed lines show the more realistic 1σ limits on A_B (0.148 ≲ A_B ≲ 0.383), which cover the possible values for q. Our measured dayside brightness temperature is consistent with full heat redistribution.