condition mean min max 3 h after light 0.9049573333333334 0.643545 1.17439 6 h after light 0.863739 0.637707 0.988198 9 h after light 1.8676533333333334 1.47499 2.16268 12 h after light 2.2772725 1.04005 2.89387 3 h after dark 2.57717 1.92685 3.14412 6 h after dark 3.12108 1.84756 4.7297 9 h after dark 1.9574066666666665 1.45909 2.72442 12 h after dark 1.446565 1.05682 1.83631