condition mean min max 2 h after light 0.6538011666666667 0.447459 1.19496 6 h after light 0.5566841666666666 0.289024 0.778171 10 h after light 0.5659379999999999 0.267505 0.87391 14 h after light 1.0845381666666667 0.562608 2.11635 18 h after light 1.3824075 0.849545 1.88463 2 h after dark 1.027801 0.780586 1.36412