condition mean min max 0 h after light 0.0 0.0 0.0 2 h after light 0.0989345 0.0 0.197869 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 0.0 0.0 0.0 8 h after dark 0.111081 0.0 0.222162 12 h after dark 0.0 0.0 0.0