Light bills and all other utility bills always suck, no matter how small they are because you are paying for something you have already used...except for cable/phone/internet (at least where I live). I'd call ASAP & make payment arrangements. How many months worth are you talking here? You said you were already behind...but, if you are only a month behind $655 sounds high to me...mine was $162 and that about gave me a heart attack...but, I know why mine is what it is...hubby is getting cold blooded in his old age & thinks he needs to turn on a small electric heater to use the toilet...and warm up our bedroom at night. Me? I say put on a robe & slippers & you are good to go...no pun intended.