condition mean min max 0 h after light 6.885465 6.39273 7.3782 4 h after light 6.945365000000001 6.87966 7.01107 8 h after light 9.962605 9.90531 10.0199 4 h after dark 11.1317 10.6235 11.6399 8 h after dark 9.34104 9.20264 9.47944 12 h after dark 7.553515 7.38839 7.71864