condition mean min max 4 h after light 826.5493745 824.914622 828.184127 8 h after light 532.1213735 475.9989 588.243847 12 h after light 407.3581275 365.714967 449.001288 4 h after dark 310.235556 274.675394 345.795718 8 h after dark 252.025959 201.622064 302.429854 12 h after dark 712.342127 712.342127 712.342127