How much are your holiday lights adding to your electric bill?

(NEXSTAR) – Whether you're wrapping your Christmas tree in one strand of lights or adorning your home with a Griswold-like display, the type of lights you select can have a big impact on your electric bill.
A walk down the aisle of Christmas lights can be overwhelming. First, the bulb type - LED or incandescent? Then there's the size of the bulb, with the most common ranging from the typical strand of mini bulbs, followed by C7 and the larger C9 (roughly 2.25").First, the math. Electricity