condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.0733505 0.0 0.146701 8 h after light 0.03680175 0.0 0.0736035 4 h after dark 0.0365332 0.0 0.0730664 8 h after dark 0.03663545 0.0 0.0732709 12 h after dark 0.0363389 0.0 0.0726778