condition mean min max 4 h after light 0.0671505 0.0 0.134301 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 4 h after dark 0.0 0.0 0.0 8 h after dark 0.20883 0.0 0.358207 12 h after dark 0.0 0.0 0.0