condition mean min max 4 h after light 5.21601 4.78668 5.64534 8 h after light 3.64351 3.52203 3.76499 12 h after light 5.85469 5.46333 6.24605 4 h after dark 6.952506666666666 6.49286 7.50545 8 h after dark 9.20401 8.82743 9.45287 12 h after dark 8.010003333333334 7.40191 8.62616