As the saying goes, you get what you pay for, the price is extremely cheap, and the cost cannot be high. Buying is better than selling. No matter how cheap it is, he will make money, and no one will do a loss-making business. The result is that the more the lamp is made, the lower the price, but the quality is not guaranteed. So how do we distinguish when we buy and sell led street light?
First, its light-emitting chip is poor, which is reflected in the light-emitting efficiency. The luminous efficiency of a single chip is 90lm/W, and the efficiency of the entire lamp is low, generally below 80lm/W. Now Zhengchang's big brand LED chips must reach at least 140lm/W, which is incomparable. Some say that inefficiency doesn't matter if it can be turned on. However, with it comes a lot of heat generation. After a long period of time, the light attenuation expands rapidly. In less than a year or two, it basically needs to be scrapped.
The second is the choice of driving power supply. Due to the different selection of accessories, the price gap of the power supply of the same specification is too large, and the service life will also be very different. Low-cost power supplies start to be damaged in large areas after two years, but high-quality power supplies are generally guaranteed for more than 5 years, with a service life of more than 7 or 8 years, and maintenance costs are greatly reduced.
The design and material of the led street light radiator are also very important. Good radiator design is scientific and reasonable, fast heat dissipation, long lighting time, small temperature rise change, not hot to the touch, but blindly reducing costs, rough radiator lamps will quickly heat up, which will affect the normal power of the lamps, and will Accelerates the light decay of the fixture.
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