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Standalone Switch Mode Power Supply (SMPS) is a type of power supply that converts AC (alternating current) from the electrical grid to a regulated DC (direct current) output. It's called "switch mode" because it uses high-frequency switching to convert the power, making it more efficient, compact, and versatile compared to older linear power supplies.Switch Mode Power Supplies are typically more efficient than linear power supplies. This is because SMPS uses high-frequency switching, which minimizes energy losses in the form of heat. This results in less waste and allows for smaller, lighter power supplies.

400W LED Power Supply Box is a power conversion unit designed to supply a 400-watt output to power LED lighting systems. This power supply converts AC (Alternating Current) from a standard wall outlet (typically 100V-240V AC) into the required DC (Direct Current) that LED lights need to operate.

This kind of LED power supply box is used in applications where a higher power load is needed, such as large-scale LED installations, commercial lighting systems, outdoor lighting, LED signage, and high-power LED arrays.