Abstract: A lighting device includes translucent shell, bottom base, lamp base, light bar module, two or more metal support bars and two metal conducting bars. The bottom base connected with the translucent shell and formed a receiving space together. The lamp base set on the bottom base and equipped with a table-board. The light bar module is formed by connecting two or more light bars in series, between said two or more light bars, there are two supporting points, and s the light bar module has two electrical connection points. The metal support bars are connected to the one support point, respectively; the metal conducting bars are connected to the two electrical connection points of the light bar module, respectively, wherein the metal support bar, the light bar and the metal conducting bar constituted a side component of two substantial triangular frame structures.