ESO SkyCalc sky emission models computed with default settings at various airmasses for three solar flux levels:
70 SFU (min),
130 SFU (average),
200 SFU (max),
and three sky brightness conditions:
Dark: Moon set at -90 deg elevation,
Grey: 30% Moon component (66.4 deg phase) at 45 deg elevation and 45 deg distance,
Bright: 60% Moon component (101.5 deg phase) at 45 deg elevation and 45 deg distance.

