condition mean min max 4 h after light 0.0178993 0.0 0.0357986 8 h after light 0.0 0.0 0.0 12 h after light 0.00885575 0.0 0.0177115 4 h after dark 0.0 0.0 0.0 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0192912 0.0 0.0385824