1-10PCS DC6-40V to DC1.2-36V 20A 300W Buck Converter Step-down Voltage Regulator
1/2/5/10 x 300W 20A Constant Current DC-DC Adjustable Step Down LED Driver Module. Output Current: 20A(max.)., 15A(suggested). Efficiency: 95%(24V to 12V, 20A). The buck module has 2 heat sink that could enhance heat dissipation.