An LED lamp includes an insulated heat-dissipating tube, one or more LED light-emitting element, a lamp electrode holder, a lamp electrode, and a lamp cover. The lamp electrode holder is disposed at an end of the insulated heat-dissipating tube. The lamp electrode is housed by the lamp electrode holder. An outer wall of the insulated heat-dissipating tube includes a first outer wall configured to house the at least one LED lighting-emitting element, and a second outer wall in direct contact with the surrounding air. The at least one LED lighting-emitting element and the first outer wall are covered by the lamp cover. The second outer wall of the insulated heat-dissipating tube and an outer surface of the lamp cover together form an outer surface of the LED lamp.