condition mean min max 4 h after light 152.095369 144.946388 159.24435 8 h after light 135.5208145 119.01154 152.030089 12 h after light 136.394767 115.729318 157.060216 4 h after dark 92.638807 79.57611 105.701504 8 h after dark 103.962142 86.816507 121.107777 12 h after dark 187.385903 187.385903 187.385903