condition mean min max 4 h after light 5.94176 5.687119999999999 6.15378 8 h after light 5.67508 5.288869999999999 5.87239 12 h after light 6.836203333333334 6.718160000000001 6.97923 4 h after dark 6.752273333333333 6.57632 6.848669999999999 8 h after dark 6.594976666666667 6.38013 6.96103 12 h after dark 6.20128 6.19174 6.2108099999999995