PURPOSE: A light emitting diode (LED) lighting device is provided to improve commercial potential and durability by using dimethyl silicon oil as heat radiating liquid. CONSTITUTION: A housing (2) of a cavity structure is combined with a base. A LED package is installed inside the housing. A supporting structure (40) fixes the light emitting diode package and power supply module. The power supplying module supplies outer AC power to the LED package. A permeable insulation heat radiating fluid (9) fills in the housing of the cavity structure.
