Patent ID: 8403522

Claim:
A light emitting diode (LED) lamp comprising: a heat dissipation module; a light source mounted on the heat dissipation module, the light source comprising a substrate and a number of LEDs arranged in a plurality of groups on the substrate along a lengthwise direction of the substrate; a cover covering the LEDs, the cover comprising an inner surface and a convex outer surface, the inner surface comprising a first concave surface and a plurality of second concave surfaces at lateral sides of the first concave surface, the first concave surface and the second concave surfaces extending along a lengthwise direction of the cover, each of the second concave surfaces facing a corresponding group of the LEDs, and configured as a light incident surface, wherein a height of each of the second concave surfaces is equal to or less than that of the first concave surface; and a reflective layer coated on the first concave surface, wherein light generated by the LEDs has a part transmitting outwardly directly out of the cover and another part reflected by the reflective layer to transmit out of the cover.