condition mean min max 4 h after light 4.138985 3.04407 5.2339 8 h after light 5.186985 4.87967 5.4943 12 h after light 6.50793 6.48934 6.52652 4 h after dark 8.184893333333333 7.26955 9.39495 8 h after dark 6.593446666666667 6.22239 7.19558 12 h after dark 4.504653333333334 3.65443 5.23219