A LED lamp device includes a power unit serially linking a plurality of LED lamp sets by a power cord. The power unit has a regulating circuit, power switch, and an indicator. Each LED lamp set includes a metal heat sink which can be fixed to a specific position by bolts, clamping, gluing, or other method. The metal heat sink has at least one and five most LEDs. The LEDs can be arranged to a metal circuit board, print circuit board, or directly mounted on surface of the metal heat sink. A lens having a receiving space is arranged above the plurality of LEDs.