First, you need to provide the LED lamp’s specifications, such as power rating, number of LEDs connected in series and parallel, current, voltage, and so forth. Otherwise, there’s no way to select a suitable power supply—after all, you wouldn’t choose the power supply first and then match it with an LED lamp, would you? After all, the LED lamp’s power rating must be determined based on factors like room size and desired brightness.

LED Power Supply Selection:

1. Current: LED power supply The output current is best maintained at around 90% of the LED lamp’s rated current—never exceeding the rated current, as this would drastically shorten the LED lamp’s lifespan. Likewise, the output current should not fall below 70% of the LED lamp’s rated current, since doing so would significantly reduce the LED lamp’s brightness. Ideally, the accuracy of the LED power supply’s output current should be within ±5%; the higher the accuracy, the better. If the current accuracy exceeds ±10%, such a power supply should absolutely not be used—because not only would the LED lamp’s brightness become unstable, but its lifespan would also be severely shortened.

2. Voltage: Ideally, the output voltage range of an LED power supply should cover 80% to 120% of the LED lamp’s rated voltage; at this range, both efficiency and power factor are relatively high. The minimum output voltage of the LED power supply must be less than 90% of the LED lamp’s rated voltage, while the maximum output voltage must exceed 110%. Otherwise, differences and inconsistencies in the LED bead parameters could prevent the LED lamp from lighting up. The wider the output voltage range of the LED power supply, the lower its efficiency and power factor will be—but this does not affect normal operation.

Dongguan Liangrui Electronics Co., Ltd. Founded in October 2011, our company is located in Hengli Town, Dongguan City—a region with exceptionally convenient transportation. It takes less than an hour to drive north to Guangzhou, south to Shenzhen, east to Huizhou, and west to Zhongshan. Our factory covers an area of 5,200 square meters and is equipped with a plastic injection molding workshop, a wire harness workshop, an AI component insertion workshop, a surface-mount technology (SMT) workshop, an assembly workshop, a potting workshop, and a finished-product workshop. We offer a comprehensive range of products and services, including the R&D, manufacturing, and sales of LED power supplies, home appliance power supplies, medical power supplies, communication power supplies, and waterproof wires. All of our products have successfully passed safety certification standards from leading European and American countries, such as UL, CUL, TUV/GS, CE, SAA, and PSE.