Patent ID: 8596835

Claim:
An LED underwater lamp, comprising: a housing ( 1 ), one end of which is provided with an opening and the other end of which is provided with a power line ( 5 ); the end with the opening is provided with a step ( 11 ) that can clip onto one side of a mounting plate ( 20 ); the housing can be fixed onto the mounting plate ( 20 ) through a retaining nut ( 13 ) engaging with an external thread on the outer wall of the housing ( 1 ); and an LED lamp body ( 2 ) which is provided with an LED bulb ( 4 ) inside and fixed rotatably within the housing ( 1 ) through a rotational fastening structure ( 6 ); the rotational fastening structure comprises a plurality of snap-platforms ( 8 ) which are disposed on the inner wall of the housing ( 1 ) and surround in annular shape; a snap surface ( 9 ) is disposed at the side of the snap-platforms ( 8 ) which is far away from the opening of the housing ( 1 ) and the snap surface ( 9 ) is an inclined cambered surface; a hook ( 10 ) which can slide along the snap surface is disposed on the outer wall of the LED lamp body ( 2 ) and the hook is provided with an inclined plane ( 101 ) engaging with the snap surface ( 9 ); the rotational fastening structure ( 6 ) also comprises an internal thread disposed on the inner wall of the housing ( 1 ) and an external thread disposed on the outer wall of the LED lamp body ( 2 ), wherein the external thread engages with the internal thread.