Do not use real candles to decorate trees, even artificial trees. Do not spray your tree with hair spray to prevent needles from falling. This allows the tree to burn easier. Turn off lights when you sleep or leave home for a long period of time. The National Christmas Tree at the White House will be decorated with approximately 10,000 lights on 1,600 feet of wire.
Electrical overloads can become a problem.
Do not string together more than three sets of 100 miniature lights. Do not mix miniatures with larger bulbs on the same string. The mismatched wattage could burn out bulbs or short a circuit. Do not overextend the circuit wattage capacity when setting out your outdoor lights. Wattage is determined by multiplying voltage by circuit amperage.