condition mean min max 0 h after light 1.912555 1.70173 2.12338 4 h after light 3.30363 2.98329 3.62397 8 h after light 3.80671 3.6745 3.93892 4 h after dark 1.85669 0.7299 2.98348 8 h after dark 2.46781 2.40495 2.53067 12 h after dark 2.197685 1.80245 2.59292