Heat sink for luminaire and luminaire arrangements having a heat sink
A heat sink for a luminaire includes a central portion having a top surface and a bottom surface. The bottom surface is adapted to receive a lighting arrangement. The heat sink further includes a plurality of arms configured to dissipate heat generated by the lighting arrangement. The plurality of arms extend radially outward from the central portion. Each one of the plurality of arms is substantially arcuate between a proximal end and a distal end.
1. A heat sink for a luminaire comprising:
a central portion having a top surface and a bottom surface, the bottom surface being adapted to receive a lighting arrangement;
a plurality of arms configured to dissipate heat generated by the lighting arrangement, the plurality of arms extending radially outward from the central portion, each one of the plurality of arms being substantially arcuate between a proximal end and a distal end;
where at least one of the plurality of arms is hollow and defines an interior space that extends between the proximal end and the distal end;
wherein at least one vent is provided on the hollow arm, the at least one vent being in fluid communication with the interior space; and
wherein the hollow arm includes a first side surface and a second side surface, and wherein the at least one vent includes a first vent and a second vent, the first vent being circular and provided on the first side surface toward the proximal end of the arm, the second vent being stadium-shaped and provided on the first side surface toward the distal end of the arm.
2. The heat sink of claim 1 further comprising a plurality of fins provided in the interior space.
3. The heat sink of claim 2 , wherein the hollow arm includes a first interior sidewall and a second interior sidewall, and wherein the plurality of fins includes full width fins and partial width fins, the full width fins having a width that is equal to a distance between the first interior sidewall and the second interior sidewall, the partial width fins having a width that is less than the distance between the first interior sidewall and the second interior sidewall.
4. The heat sink of claim 1 , wherein the interior space of the at least one of the plurality of arms is trapezoid shaped.
5. The heat sink of claim 1 , wherein the plurality of arms are adapted to receive a reflector, the reflector being configured to direct and focus light emitted by the lighting arrangement.
6. The heat sink of claim 5 further comprising at least one locking tab that is configured to attach the reflector to the heat sink, the at least one locking tab including a head portion and a neck portion, the neck portion connecting the head portion to the central portion, the head portion having a diameter that is larger than a diameter of the neck portion.
7. The heat sink of claim 5 further comprising a seal groove formed as a circular recess on the central portion, the seal groove being configured to receive a seal for creating a waterproof barrier between the heat sink and the reflector.
8. The heat sink of claim 1 further comprising a male adjustment part, the male adjustment part being configured to interact with a female adjustment part provided on a base to connect the heat sink to the base, the male adjustment part including a ball portion that is received in a socket portion of the female adjustment part.
9. The heat sink of claim 8 , wherein the male adjustment part includes a locking tab provided on the ball portion, and wherein the female adjustment part includes a plurality of slots provided on the socket portion, the locking tab engaging with one of the plurality of slots to fix an orientation of the heat sink relative to the base.
10. The heat sink of claim 1 , wherein the lighting arrangement includes light emitting diodes.
11. The heat sink of claim 1 , wherein the central portion and the arms cooperate to define a semi-spherical shaped interior space.