There's never been a cannonball head as far as I'm aware. You can call Meathook cannonball head as an insult to his baldness. And on the idol things you're thinking of Lemonhead, he's the one who makes the idols that you can steal. Red Skull is thus called because of his red skull mask, lemonhead because of his lemon and I can't remember the other cannibal's name.
There is a light and it never goes out.