Patent ID: 7661854

Claim:
An LED (light emitting diode) lamp adapted for outdoor application comprising: a heat sink; a plurality of LED modules attached on the heat sink; an envelope receiving the heat sink and the LED modules therein; a top cover and a bottom cover located at two ends of the envelope, respectively; a plurality of fasteners extending through the top cover and engaging one end of the heat sink; a plurality of shafts extending though the bottom cover and engaging the other end of the heat sink, wherein an elastic member is coiled around each of the shafts; a first waterproof pad sandwiched between the envelope and the top cover, and a second waterproof pad sandwiched between the envelope and the bottom cover; wherein when the fasteners are fastened toward the heat sink, the elastic member moves relative to the shaft, whereby the heat sink makes tight contact with the top cover, and the first waterproof pad is tightly sandwiched between the envelope and the top cover, and the second waterproof pad is tightly sandwiched between the envelope and the bottom cover.