Lighting device having composite micro-structure

A lighting device having composite micro-structure, comprising:

• a main body having an installation slot;
• a light source board disposed in the installation slot, and comprising a circuit board and a light source disposed on one side of the circuit board;
• and
• a light cover disposed on one side of the main body to form an accommodating space between the light cover and the main body, and the light source board being disposed in the accommodating space, wherein the light cover comprises two vertical portions and a curved portion disposed between the vertical portions, and an inner surface of the curved portion has a plurality of arc-shaped recess and a plurality of flat portions alternately arranged;
• wherein the curved portion comprises a central section and two lateral sections, and the arc-shaped recess and the flat portions are disposed in the central section, wherein an inner surface of the lateral section is provided with a plurality of first sawteeth and the first sawteeth are obtuse-angled triangles, wherein an inner surface of the vertical portion is provided with a plurality of second sawteeth and the second sawteeth are acute-angled triangles.