condition mean min max 4 h after light 7.951919 7.895486 8.008352 8 h after light 8.243758 6.911103 9.576413 12 h after light 8.175699 7.858247 8.493151 4 h after dark 8.6458735 7.784804 9.506943 8 h after dark 8.657895499999999 7.477326 9.838465 12 h after dark 9.013221 9.013221 9.013221