Patent ID: 8449139

Claim:
A LED submarine lighting device, comprising: a light-transmissive lamp tube comprising opposing front-end opening and rear-end opening and two longitudinal locating grooves bilaterally located on an inside wall thereof between said front-end opening and said rear-end opening; a LED substrate being an aluminum clad circuit board fastened to said longitudinal locating grooves inside said light-transmissive lamp, said LED substrate comprising a plurality of LED devices installed in a top surface thereof for giving off light; a heat conducting bar mounted in said light-transmissive lamp tube and stopped between a bottom surface of said LED substrate and the inside wall of said light-transmissive lamp tube for dissipating waste heat from said LED substrate; a front-end cap sealing said front-end opening of said light-transmissive lamp tube in a water-tight manner; and a rear-end cap sealing said rear-end opening of said light-transmissive lamp tube in a water-tight manner; wherein said heat conducting bar comprises a top cut-face abutted against the bottom surface of said LED substrate.