condition mean min max 4 h after light 5.825403333333334 5.71166 6.008380000000001 8 h after light 5.836376666666666 5.59494 6.1658599999999995 12 h after light 5.838343333333333 5.75684 5.96345 4 h after dark 5.85335 5.6898 5.96925 8 h after dark 5.76772 5.74518 5.79252 12 h after dark 5.848043333333334 5.72576 5.9934400000000005