According to a press release at emediawire.com, the town of Mason, Michigan has changed over to LED lights this year.

Their old tree used 500 C7 and C9 lights. Obviously this was pulling quite a bit of power! They are replacing the lights on the tree with 1200 C7 LED lights, and lower their overall electric bill by an expected $250.

The Mason tree is illuminated each year for approximately 6 weeks beginning the day after Thanksgiving and ending after the New Year. The old C7 and C9 bulbs consumed an average of 6.5 watts per bulb which, after 42 days of 24-hour operation, consumed 3276 kilowatt hours of electricity (about $327 worth.) In contrast, the new 1200 LED Christmas lights will consume only 870 kilowatt hours of electricity (about $87 worth) during the same period. This will save the City about $250 each year while adding over 700 lights to its tree.