Distributions of H I column density, mass outflow rate, and energy outflow rate as a function of Ω and T_spin/f for lines 1 and 2, where Ω is the solid angle of the outflow and T_spin/f is the spin temperature divided by the covering factor. Note that the column density limits are constrained by T_spin/f > T_cmb at z = 2.4 and N_HI < 3 × 10²² (Schaye 2001; Curran 2024), where T_cmb is the temperature of the cosmic microwave background.