condition mean min max 0 h after light 4.515475 0.0 9.03095 2 h after light 0.0 0.0 0.0 4 h after light 0.0 0.0 0.0 8 h after light 3.55624 0.0 7.11248 12 h after light 0.0 0.0 0.0 2 h after dark 0.0 0.0 0.0 4 h after dark 4.42438 0.0 8.84876 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0