condition mean min max 4 h after light 0.8799815 0.707273 1.05269 8 h after light 0.0 0.0 0.0 12 h after light 0.6391245 0.349927 0.928322 4 h after dark 1.544739 0.917558 2.17192 8 h after dark 0.7636575 0.607687 0.919628 12 h after dark 0.635225 0.0 1.27045