Why is there a light in your refrigerator but not in your freezer?

It is really weird if you realize that there is a light in your refrigerator but not in your freezer. I wondered too lol. But after I did a little bit of research, I found out it is a really simple knowledge. Because inside the refrigerator, the temperature of the container is not that cold to give an effect on the lamps in the refrigerator. But if you imagine that there is a hot light bulbs inside a freezer which is at least below 0`C or lower.... and think what would happen to the light bulbs.....?
It would pop up!!!!!
So that is why there is no lights in the freezer.