Which power supply unit is used in conjunction with the FL-1D floodlight for MQ-1 and MQ-9 aircraft?

The DCs40-75 "Sorensen" power supply unit is specifically designed to match the power requirements of the FL-1D floodlight used in MQ-1 and MQ-9 aircraft. This power supply is tailored to provide the necessary voltage and current specifications that are essential for the proper functioning of the floodlight, ensuring adequate illumination during operations.

The choice of this particular power supply unit over others is due to its capability to effectively support the floodlight’s operational demands, including maintenance of stable performance during varied environmental conditions encountered during flight operations. The other options, while also being Sorensen power supply units, either operate outside the necessary power range or are designed for different applications, making them unsuitable for the specific requirements of the FL-1D floodlight system.