LED lamp with a heat sink assembly

A heat sink assembly for dissipating heat from an LED module comprising:

• a first heat sink comprising:
• a planar base adapted for attaching the LED module thereon;
• and
• a plurality of fin groups formed on the base and spaced from each other along a first direction, the plurality of fin groups being separated by multiple channels;
• at least a second heat sink juxtaposed with the first heat sink along a second direction perpendicular to the first direction;
• and
• at least a heat pipe having a portion receivably fitted between two adjacent ones of the plurality of fin groups, and an end extending beyond the first heat sink to be inserted into the at least a second heat sink;
• wherein each of the plurality of fin groups comprises a plurality of fins, the at least a second heat sink has a top substantially level with a top of the first heat sink and a bottom below a bottom of the first heat sink, and the at least a second heat sink has a gap defined through the top and bottom thereof so that air can flow vertically through the at least a second heat sink;
• and
• wherein some of the fins are truncated to define a plurality of recesses, the recesses being located over the base and near a periphery of the base of the first heat sink.

An LED lamp comprising:

• a heat sink having a base defining a bottom surface and a top surface;
• a plurality of fins extending upwardly from the top surface of the base;
• an LED module having a printed circuit board attached to the bottom surface of the base and a plurality of LEDs mounted on the printed circuit board;
• first and second fin sets located at opposite lateral sides of the heat sink, respectively, wherein each of the first and second fin sets has a lower portion located below the bottom surface of the base, each of the first and second fin sets has a plurality of sheets defining a plurality of gaps between every two adjacent sheets, and an airflow can flow from a place below the first and second fin sets through the gaps in each of the first and second fin sets to a place above the first and second fin sets;
• wherein a plurality of channels are defined across the plurality of fins of the heat sink to separate the plurality of fins into multiple fin groups;
• and
• wherein some of the fins are truncated to define a plurality of recesses, the recesses being located over the top surface of the base of the heat sink and near a periphery of the base of the heat sink.