Common problems of LED street lights

As an important lighting facility for urban development, the quality of LED street lights is the top priority of major projects. However, LED street lights market prices are varied and the quality is uneven. The manufacturers' patent awareness is not strong and the innovation is insufficient. The price war in the industry has caused manufacturers to continuously reduce costs in terms of materials and technology, which has a significant impact on the quality of LED street lights. , It is often seen that the street lights dim after being used for a period of time. The way to replace the LED street light is very cumbersome. This is because there are many parts inside the LED street light. Except for the light source (chip), damage to other parts will cause the chip to not light up. It is impossible to immediately determine the cause of the LED street light damage on the spot. Ship it back to the factory for various tests.

For outdoor high-altitude devices such as LED street lights, installation is more difficult, and maintenance is even more difficult. For street light managers, unstable product quality makes maintenance costs higher.

LED street light

A company with the ability to inspect LED street light materials can quickly evaluate the raw materials and processes of LED street lights from multiple perspectives such as the entire lamp material, product defects, lamp sulfur detection, photoelectric performance, heat dissipation performance, assembly and safety, etc. Identify the quality of LED street lights.

1. Serving customers

Relevant government departments, street light offices, urban investment, construction bureaus, owners, bidding and procurement, LED street light manufacturers.

2. LED street lights are common

1. The enthusiasm of configuring false standard LED street lights is also accompanied by the reduction of price and profit. The fierce competition has also led to many businesses starting to cut corners and false standard product parameters. This is also caused by customers' repeated price comparisons and low prices. It is also related to the practices of some manufacturers.

2. The core of counterfeit chip LED lamps is the chip, which directly determines the performance of the lamp! However, some unscrupulous merchants take advantage of customers' unprofessionalism and use low-cost chips to make customers buy low-quality products at a high unit price, causing direct economic losses and causing serious quality risks to LED lamps.

3. Copper wires pretend to be gold wires. Many LED manufacturers try to develop copper alloys, gold-clad silver alloy wires, and silver alloy wires 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. For example, silver wires and gold-coated silver alloy wires are susceptible to sulfur/chlorine/bromination corrosion, and copper wires are prone to oxidation and sulfidation. For encapsulated silica gel similar to water-absorbent and breathable sponge, these alternatives make the bonding wire more susceptible to chemical corrosion, reduce the reliability of the light source, and use it for a long time, and the LED lamp beads are more likely to break and die.

4. The design of the light distribution system of the street lamp is unreasonable. In terms of optical design, if the design of the light distribution system of the street lamp is unreasonable, the lighting effect will be unsatisfactory. 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 is not solved well, it will quickly cause LED aging and decrease stability.

6. Power failure. In terms of power supply, if the power supply fails, during the test and inspection, "the whole lamp is off", "partially damaged", "individual LED lamp bead is dead", and "the whole lamp is flickering" will appear during the test and inspection process. Phenomenon.

7. Safety and failsafe issues are also worthy of serious attention: 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 cable metal sheath is used The process of making PE main trunk line is complicated and the reliability is low; the problem of low IP waterproof and dustproof level.

8. The lamp has substances harmful to the light source