Common causes of LED street lights not turning on


As an important lighting facility for urban development […]

As an important lighting facility for urban development, the quality of LED street lights is the top priority for everyone. However, the market price of LED street lights is varied and the quality is uneven. The price war in the industry has led manufacturers to continuously reduce costs in terms of materials and craftsmanship. This has a great impact on the quality of LED street lights, so we often see street lights in use It will not light up after a period of time.

Replacing LED street lights is very cumbersome, because there are many internal parts in LED street lights. Except for the light source (chip), damage to other parts will cause the chip to not light up. The LED street lights need to be removed and shipped back to the factory for testing. For outdoor high-altitude devices such as LED street lights, installation is more difficult and maintenance is more difficult. For street light managers, unstable product quality increases maintenance costs. There are also many problems in the LED street light industry, leading to increased product follow-up service costs:

1. Configure virtual standard

The popularity of LED street lights is also accompanied by the reduction of price and profit. The fierce competition has caused many businesses to start cutting corners and imagining product parameters.

2. Counterfeit chips

The core of LED lamps is the chip, which directly determines the performance of the lamps. However, some unscrupulous merchants take advantage of customers' unprofessionalism and use low-cost chips to allow customers to buy low-quality products at high prices, causing economic losses and causing serious hidden dangers to LED lamps.

3. Copper wire pretends to be gold wire

Many LED manufacturers try to develop materials such as copper alloy, gold-coated silver alloy wire, and silver alloy wire to replace expensive gold wires. Although these alternatives are better than gold wires in some characteristics, they are much worse in terms of chemical stability, the reliability of the light source is reduced, the use time is long, and the LED lamp beads are more likely to break and die.

4. The design of the light distribution system of street lights is unreasonable

In terms of optical design, if the design of the light distribution system of the street lamp is unreasonable, the lighting effect is not ideal. Problems such as "bright under the lamp", "black under the lamp", "zebra crossing", "uneven illumination", and "yellow circle" will appear during the test.

5. Poor heat dissipation design

In terms of heat dissipation design, every time the PN junction temperature of the LED chip increases by 10 degrees, the life of the semiconductor device will be reduced by multiples. Due to the high brightness requirements of LED street lamps, the use environment is relatively harsh, if the heat dissipation problem cannot be solved, it will quickly lead to LED aging and reduce stability.

6. Power failure

If the power supply is faulty, during the test and inspection, the phenomenon of "the whole lamp is off", "partially damaged", "individual LED lamp bead is dead", and "the whole lamp is flickering" will appear.

7. Safety failure

The street lamp power supply has no leakage protection; the street lamp ballast quality is shoddy; the circuit breaker has not been tested for sensitivity, and the rated trip current is selected too large; the use of the cable metal sheath as the PE main trunk has a complicated process and low reliability; IP waterproof The problem of low dustproof level.

8. The lamp has substances harmful to the light source

The blackening of LED light sources is a common problem encountered by major LED companies. Most materials in lamps need to be checked for substances that affect the life of the light source. The occurrence of the above problems has a great impact on the performance of LED street lights, and even directly causes LED street lights to not light up.