condition mean min max 4 h after light 341.0 341.0 341.0 8 h after light 507.85 452.3 563.4 12 h after light 538.15 225.8 850.5 4 h after dark 273.9 138.7 409.1 8 h after dark 254.15 166.2 342.1 12 h after dark 216.1 152.0 280.2