On Chanukah, you could get by lighting one candle each day for the entire household.

You could do better and have everyone in the household light one candle each day.

But the best, most beautiful way to do the mitzvah of Chanukah is to light one more candle each day than you lit the day before.

And this is one mitzvah that the entire Jewish world decided to do in the most beautiful way.

Because, when it’s light outside, it’s okay to just do what’s needed.

But when it’s dark and cold, we’ve all got to do our very best.

Igrot Melech, vol. 1, pg. 262 (footnote).