Option 1: Car brake materials are typically made from various types of alloys and composites, such as cast iron or carbon ceramic. Misch metal is not commonly used in the manufacturing of car brakes, so option 1 is not the correct answer.

Option 2: Smoke detectors contain a small amount of americium-241, which is a radioactive element used in the ionization process. Misch metal does not have any relevance or application in the manufacturing of smoke detectors, so option 2 is not the correct answer.

Option 3: Misch metal is indeed widely used in the manufacture of cigarette lighters. It is used as a flint in traditional cigarette lighters to create sparks when struck against a rough surface, igniting the lighter`s fuel. This makes option 3 the correct answer.

Option 4: Emergency lights generally do not involve the use of misch metal in their manufacture. They are typically powered by batteries or electrical sources and are not directly related to the properties or applications of misch metal, so option 4 is not the correct answer.

In conclusion, option 3 - cigarette lighters, is the correct answer as misch metal is commonly used in their manufacture.