Patent ID: 8851699
Filing Date: 2014-10-07
Classification: F21S,F21V,F21Y,Y10S

Abstract:
1. A lighting fixture adapted to be installed on a ceiling having a predetermined plane comprising: a light emitting diode (LED) light source supported by the lighting fixture; a first heat sink portion in proximity to the LED and defining a respective cavity therein that is in communication with one or more vent openings extending through a portion of the first heat sink portion; a second heat sink portion spaced-apart from above the first heat sink portion and defining a respective cavity therein that is generally aligned with the cavity of the first heat sink portion to form a thermal chimney, the respective cavity of the second heat sink portion defining one or more vent openings extending through a portion of the second heat sink portion; and at least a portion of the lighting fixture protruding below the place of the ceiling supporting said light fixture, whereby cooling fluids pass from outside of the first heat sink portion through the one or more vent openings of the first heat sink portion into the cavity of the first heat sink portion and into the cavity of the second heat sink portion and through the one or more vent openings of the second heat sink portion to outside of the second heat sink portion.