condition mean min max 3 h after light 0.0 0.0 0.0 6 h after light 0.144695 0.0 0.434085 9 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 3 h after dark 0.0 0.0 0.0 6 h after dark 0.0 0.0 0.0 9 h after dark 0.13008233333333333 0.0 0.390247 12 h after dark 0.0 0.0 0.0