How do you know that some of the fright lights are defective? If a guest complains that a fright light is defective, we will take steps to check to see if it really was defective or if they just couldn't aim. If we think it is broken, we will inform the quests who are riding in that car and call maintence, most of the time maintence will come out later in the same day and fix the gun, or they will fix it overnight. But, there is not an abbundance of broken fright lights, 90% of the time when a guest complains, there is nothing wrong with the gun, they just need more practice.