LED LIGHTING DEVICE

WIPO Patent Application WO/2020/228590

A1

An LED lighting device, comprising: a first portion (I) comprising a lamp base (71); a second portion (II) comprising a housing (3) and a power supply (4), the power supply (4) being provided in the housing (3); a third portion (III) in which a heat exchange unit (1) and a light-emitting unit (2) are provided, wherein the light-emitting unit (2) is connected to the heat exchange unit (1) to form a heat conduction path, and the light-emitting unit (2) is electrically connected to the power supply (4); the first portion (I), the second portion (II), and the third portion (III) are sequentially arranged; the lamp base (71) extends along a first direction (X); the light-emitting unit (2) comprises a light-emitting body (21) and a substrate (22); the substrate (22) is provided with a mounting surface (221); the light-emitting body (21) is mounted on the mounting surface (221), and the mounting surface (221) is provided in parallel to the first direction (X); a distance b between the start of the second portion (II) and a plane where the center of gravity of the LED lighting device is located satisfies the following relation: (L2+L3)/5