But what really made a tree a Christmas tree were ... By the 1930s, colored bulbs and cones were everywhere. Today an estimated 150 million light sets are sold in America each year, adding to ...

the rest of the bulbs will stay lit even if one goes out. No matter what kind of lights the machine makes, they're finally ready to be hung up on a Christmas tree.

LANSING — Is this year's Michigan Christmas ... lights adorn the tree, more than ever before. And there's one exception to the crisp, uniform red of the lights, Schor said. There's a stray green ...