This is a separate problem, but a notable one. Lighting up the entire grid is still the goal, you're describing the problem of ensuring the right set of square

This is a separate problem, but a notable one. Lighting up the entire grid is still the goal, you're describing the problem of ensuring the right set of squares is illuminated for each piece of archived content. One is a problem of archiving the content, the other is a problem of bookkeeping.