Patent ID: 7726846

Claim:
An LED lamp comprising: a fixing rod adapted for positioning the LED lamp at a desired position; a first heat sink mounted to the fixing rod; a second heat sink mounted on the first heat sink, the second heat sink comprising an upper portion near the first heat sink and a bottom end remote from the first heat sink, the second heat sink comprising a plurality of heat-conducting faces on the bottom end thereof distant from the first heat sink and arranged in sequence and at different levels, the heat-conducting faces gradually decreasing in dimension from outside to inside of the second heat sink; a plurality of LED modules attached on the heat-conducting faces of the second heat sink, respectively; and a lamp cover engaging the first heat sink to enclose the second heat sink and the LED modules, the lamp cover comprising a plurality of annular steps corresponding to the LED modules on the levels of the heat-conducting faces of the second heat sink, respectively, each step comprising a concave lens attached thereon; wherein light emitted by the LED modules respectively travels through the concave lenses of the annular steps of the lamp cover to generate a wide illumination area.