I find your comment very confusing! You don’t understand why people call it the Death Star but as soon as you got the lamp you started calling it the Death Star but you struggle to see the resemblance? Surely you’ve answered your own question…?!
As others have said, I think it’s because it looks like the Death Star. I don’t even know Star Wars and I googled what the Death Star looks like and immediately thought “oh, right, this is why people call it the Death Star lamp…”
As an amusing side note, iOS autocapitalises “Death Star”.
