Magnetic attraction lamp with Fresnel optical transparent lens with prismatic crystal surface

A magnetic attraction lamp with a Fresnel optical transparent lens with a prismatic crystal surface comprises a light transmitting part which is provided with a Fresnel light incident surface for receiving a light-emitting diode (LED) light source towards the lamp and the prismatic crystal surface which enables light emitted by the LED light source to enter the Fresnel light incident surface to generate light path oscillation refraction to change the direction so as to be output (multiple beam angles of 20-70 degrees are formed); the lamp main body is provided with a containing cavity, and the containing cavity comprises a limiting groove provided for installation of the LED light source and a buckling part arranged for limiting installation of the light-transmitting part; the contact device is connected with or arranged on the lamp main body; and the contact device is provided with a limiting guide part. Brightness enhancement and anti-dazzle are integrated, light is changed in direction and collected throug