condition mean min max 0 h after light 0.0 0.0 0.0 2 h after light 0.185537 0.0 0.371074 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 2 h after dark 0.0 0.0 0.0 4 h after dark 0.164029 0.0 0.328058 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0