condition mean min max 4 h after light 5.63348 4.77434 6.49262 8 h after light 6.90003 6.51428 7.28578 12 h after light 6.047625 5.56892 6.52633 4 h after dark 8.211093333333334 7.93617 8.36802 8 h after dark 5.830033333333334 5.47509 6.42323 12 h after dark 6.000993333333334 5.20502 6.65639