To provide a highly efficient LED lamp which can be applied directly as a conventional bulb, and in which not only a superior heat-dissipation effect can be obtained but also it can be used directly after exchanging the bulb without exchanging a lighting fixture.

The highly efficient LED lamp is constituted mainly of an LED module, a mounting substrate, a circuit device, and a heat-dissipation lamp seat, in which the LED module is installed at the mounting substrate, and the mounting substrate is constituted of metal with high heat transfer performance, while the heat-dissipation light seat is constituted of non-metal having porous gap structure of a highly heat-dissipation performance, which is directly molded into a lamp seat external shape, having an inner hollow part, in which the aperture end of the inner hollow part is sealed by the mounting substrate. A circuit device is installed in the interior, and by the circuit device, the LED module and the exterior power source are coupled, so that when the LED is lighted the generated heat is quickly transmitted by the mounting substrate.