The same precautions are necessary when using outdoor lights. Any extension cords you use also need to be approved by the UL seal. Be especially careful not to overload your electrical circuits. Although they don't present the electrical hazards that tree lights do, ornaments require care as well. One possible hazard that can be missed is the wire hanger used to put ornaments on trees.
Some mistletoe can be poisonous.
Even though mistletoe is usually hung in high places, it's a good idea to keep it well out of the reach of children. Copyright 1999 The Health Alliance.