The present patent application provides a slim light bar. The light bar includes a base (1), two upper side covers (2), a top cover (3), a straight light unit (4), a curved light unit (5) and a plurality of supporting legs (6). The top cover (3) is disposed in the middle of the top of the base (1). The upper side covers (2) are disposed at the two ends of the top of the base (1). The straight light unit (4) is connected to the straight sides of the base (1). The curved light unit (5) is connected to the curved sides of the two ends of the base (1). The supporting legs (6) are connected to the bottom of the base (1). The height of the base (1) is 26 mm to 29 mm. The present patent application uses LEDs with a diameter of 4.5 mm and the corresponding lenses have a maximum diameter of 14 mm so that the height of the base (1) is only 26 mm to 29 mm and the materials used for making the light bar are saved.