The red light at the back of a car.
Taillamps help other drivers see the car at night or when it's dark.
Examples:
The taillamp is red.
I can see the taillamps of the car in front of us.
The taillamp is bright at night.
The taillamp looks like a big red eye.
The taillamp is the best part of the car.
The taillamp is like a little red sun on the car.