condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.1068195 0.0 0.213639 12 h after light 0.086525 0.0 0.17305 4 h after dark 0.171867 0.115677 0.228057 8 h after dark 0.141851 0.057143 0.226559 12 h after dark 0.1393626935 0.000109387 0.278616