To dream of christmas lights represents gestures that are intended to make other people feel good thinking they deserve things. Being happy for others blessings. Mutual goodwill. An attitude that is supportive of togetherness for friends and family.
Negatively, may reflect jealousy, frustration, or resentment of having to be happy for others blessings. Exhausting yourself being happy for others. Feelings about other people going overboard with their gestures of mutal good will.
Example: A woman dreamed of seeing In waking life her grandson was just born and the whole family came together to celebrate it. The christmas lights may have reflected the woman’s feelings about the whole family being noticeably happy for birth of the grandson.