Abstract: A power LED lamp, particularly usable in modular luminaires of the enclosure type, comprising a lamp body which is also adapted to act as a heat sink, a plurality of power LEDs adapted to be supported by a supporting element accommodated within the lamp body, a plurality of lenses arranged at each of the LEDs; the lamp further comprises a voltage stabilizing circuit and a current stabilizing circuit which are integrated within the body of the lamp, so that the lamp can be used with traditional power supplies used for halogen lamps.