EspañolOn the one hand, it is the lack of industry norms and supervision, and on the other hand, it is caused by a series of factors such as the company's own lack of quality awareness, design capabilities, and defects in craftsmanship.
Let me take a look at the reasons for the product power deviation:
First, under the pressure of cost, the production process cut corners and omitted the necessary product testing process, and the substandard products were not eliminated in the factory and flowed to the market as shoddy products.
Second, the LED outdoor luminaires have insufficient heat dissipation design margin, and the deviation of assembly process and incoming materials causes the lamp beads to overheat, and the forward voltage drop (Vf) drops out of control, causing the actual power of the lamps to deviate from the lower limit.
Third, the LED outdoor luminaires optional driving power supply has poor thermal stability and large temperature drift of the output current, which directly causes the lamp power to deviate in a wide range.
Fourth, in order to reduce the incoming procurement cost of LED lamp beads, China Wholesale LED Outdoor Luminaires did not select the LED Vf distribution BIN according to the design requirements, causing the actual LED power consumption to deviate from the design center value.
Fifth, the constant current precision of the optional driving power supply is low (generally 5%-8%), which cannot be adapted to the various Vf BINs of lamp beads.
The first three reasons directly reflect China LED Outdoor Luminaires Manufacturers.The quality awareness of luminaires is weak and has little relevance to the design. The latter two incentives are strongly related to the precision design of the lamp drive power supply.
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