condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.081993 0.0 0.163986 8 h after light 0.082276 0.0 0.164552 4 h after dark 0.0819985 0.0 0.163997 8 h after dark 0.165189 0.0 0.330378 12 h after dark 0.0830505 0.0 0.166101