condition mean min max 0 h after light 2.035065 1.65645 2.41368 4 h after light 2.41277 2.30155 2.52399 8 h after light 1.809315 1.53288 2.08575 4 h after dark 2.6670800000000003 2.52415 2.81001 8 h after dark 2.60478 2.24338 2.96618 12 h after dark 1.856875 1.65423 2.05952