The amount of light output from a car’s rear brake lights depends on the particular car or truck in question.
Typically, rear brake lights are between 5 and 100 lumens.
By comparison, front car lights range anywhere from 10 to thousands of lumens. That’s quite a difference!
To illustrate the difference, consider this—on a clear night, a full moon is approximately 1 lumen. This gives you a visual example of the power of car brake lights’ lumens.