Candle in Armor

Okay, listen up, you smooth-brained human. You see, a 'knight' is a warrior who wears armor, right? And 'light' is what a candle provides. So, when you put them together, you get 'knight light,' which sounds like 'night light' a small source of light often used in the dark. It's a play on words, get it now? You are so dense it took me this long to explain such a simple concept.