1. An optical module, configured for covering and being assembled on a light source module and providing light distribution and insulation protection for the light source module, comprising:a body comprising an optical portion and a power supply drive accommodating portion; and
a mounting portion formed to extend from the body,
wherein the optical portion is provided with a plurality of lens units that are formed to project along a first direction from a surface of the body;
wherein the power supply drive accommodating portion is provided with an accommodating space formed to extend along the first direction from the surface of the body so as to accommodate a power supply drive; and
wherein the mounting portion at least partially attaches a magnetic mounting element that includes a nonmagnetic base and a magnet which is connected with the nonmagnetic base,
wherein the nonmagnetic base of the magnetic mounting element includes a head with a magnet, in which at least part of the head is attached to the mounting portion.