What is the real purpose and meaning of Christmas lights?
Light is a symbol of Jesus Christ The Light. Whoever follows the Light shall not walk in darkness.
Then spake Jesus again unto them, saying, I am the light of the world: he that followeth me shall not walk in darkness, but shall have the light of life. (John 8: 12)
Christmas was the moment of the Light coming into the world.
That was the true Light, which lighteth every man that cometh into the world. (John 1: 9)
The meaning of Christmas light from any light source (candle, lamp, etc) with motive of commemorating Jesus birth in your heart is Jesus Christ the Light of the World. The purpose of set lights up with motive of commemorating Jesus birth is to remember and to commemorate the birth of Jesus Christ the Light of the World. Motive is determinant factor wether your light is Christmas light or not.