condition mean min max 4 h after light 181.000113 162.460477 199.539749 8 h after light 159.578211 157.155134 162.001288 12 h after light 142.025688 121.127012 162.924364 4 h after dark 131.0344665 111.217768 150.851165 8 h after dark 151.145627 149.518563 152.772691 12 h after dark 170.488555 170.488555 170.488555