So, you've gone to great pains to fully research your Christmas decorations, and now you have a kick-ass light set-up adorning your house. But how much is it all costing you?

Electricity doesn't come free, after allâ€”which is why Rob Cockerham armed himself with a power meter and worked out exactly how much his neighborhood was spending on electricity charges for its Christmas lights. Here's a rundown of how much you're spending per hour. Calculations assume that electricity costs 12Â¢ per kilowatt hour.

### A Small Tree

Around 15 watts = 0.2Â¢ per hour.

Image by ilmungo under Creative Commons license

### A Dumb Animal Sculpture

Around 100 watts = 1 Â¢ per hour.

Image by lizjones112 under Creative Commons license

### A Big Tree

Around 250 watts = 3Â¢ per hour.

Image by Justin Lee under Creative Commons license

### A Hundred Incandescent Outdoor Globe Lights

Around 350 watts = 4Â¢ per hour.

Image by eggiepooh under Creative Commons license

### A Modest House Like This

Around 2,400 watts = 28Â¢ per hour.

Image by Rob Cockerham

### An Insane House Like This

Up to \$686 per hour (but much less if you use LEDs).

Image of the The Faucher Family house in Delaware

[Rob Cockerham via Boing Boing; Top image by jspad under Creative Commons license]