condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 4 h after dark 0.261362 0.0 0.522724 8 h after dark 0.131047 0.0 0.262094 12 h after dark 0.0 0.0 0.0