condition mean min max 4 h after light 5.695390000000001 5.49434 5.8819300000000005 8 h after light 5.76819 5.55095 6.1316 12 h after light 5.633 5.4572199999999995 5.95999 4 h after dark 5.610456666666667 5.4521 5.73695 8 h after dark 5.6469233333333335 5.31957 5.95092 12 h after dark 5.716103333333334 5.61362 5.8754800000000005