What Sherwood is saying is correct...... I wouldn't modify the lights that are on the car.

However, the BMW 7 series has something rather interesting now that this has been brought up. In a panic stop (note, they only operate when full force is applied quickly to the brake pedal), all the lights (brake lamps, tail lights, turn signals, and even backup lights) go full brightness.

I'm guessing when those reverse lights go on, any one behind you is gonna hit the brakes even harder than you!