condition mean min max 4 h after light 251.6 251.6 251.6 8 h after light 283.15 283.0 283.3 12 h after light 510.45 343.1 677.8 4 h after dark 562.55 463.5 661.6 8 h after dark 431.15 368.6 493.7 12 h after dark 330.95 298.9 363.0