Abstract: A lighting module with an efficient heatsink. The heatsink may include a base conducting portion, side fins, and a center structure. The side fins may extend away from the base portion in such a way that the distance between the fins and the center structure may vary as they may extend away from the base portion. Warm air near the base conducting portion may rise due to natural convection buoyancy, in which vertical narrowing passages may result in the passive air flow increasing in velocity as it may travel near the narrowing surface area of the heatsink improving heat transfer, and as the side fins and center structure air passages widen, the air velocity may reduce as the warm air may be distributed above heatsink.