Emerging monochromatic flux. The orange short dashed line shows a pure-He atmosphere with T_eff = 10 000 K, the solid green line a blackbody spectrum with T_eff = 10 000 K, the blue long dashed line a pure-He atmosphere with T_eff = 9379 K, and the red dotted line a pure-He atmosphere with T_eff = 9379 K scaled up by a factor 1.29 to match the total flux of a T_eff = 10 000 K spectrum. Model atmospheres correspond to logg = 8.