condition mean min max 4 h after light 309.9 309.9 309.9 8 h after light 334.65 287.9 381.4 12 h after light 279.05 180.1 378.0 4 h after dark 251.1 215.3 286.9 8 h after dark 245.8 207.5 284.1 12 h after dark 266.4 225.3 307.5