Why is my fridge light broken?

I only ever go into my fridge for food and only once in a while. This cannot possibly tax the light in there particularly heavily. I have never in all my years of going in and out of fridges heard of the light inside it breaking. Really, I don’t even see the need for a light in the fridge, because most normal people would have a room light to shine on it anyway. But since it is there, you would have thought it would last for the duration of the fridge itself. But my fridge light is broken.

Is there or could there possibly be a small creature, such as a gremlin that lives in my fridge that needs the light and turns it on when the door is closed? I don’t know. But I visited a light shop that sells nothing but lights, so that if there is a gremlin in there, he doesn’t get too scared in the darkness of my fridge. However, this shop continually changes its stock, because new lightbulbs are invented all the time, and people will want the new ones. This does not help me. The light they suggested and then sold to me on the basis that it would work, does not work. It does not fit. And now I have a fridge without a lightbulb. I am one of the people that has a light in the room that works and I can see perfectly inside it, it’s just annoying that a have a perfectly good fridge and a perfectly good lightbulb but I cannot make it fit or work, without presumably hiring an electrician or going to Afghanistan for the old lightbulbs that would fit but are no longer being sold.