8 common problems and 6 shortcomings of LED street lights

December 27, 2022

The way to replace the Led Street Light is very cumbersome. This is because there are many components 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 damage of the LED street light on site. The LED street light needs to be removed. Ship back to the factory for various tests. This is difficult for installation and maintenance for outdoor high-altitude devices such as LED street lights. For street light managers, unstable product quality makes maintenance costs rise. There are also the following tricks in the LED street light industry, which lead to an increase in the subsequent service costs of the product:

1. Configure false label

The hotness of LED street lights is also accompanied by the reduction of price and profit. The fierce competition has also led to many merchants beginning to cut corners and falsely label product parameters. This is also caused by customers' repeated price comparisons and requirements for low prices. related to practice.

2. Counterfeit chips

The core of LED lamps is the chip, which directly determines the performance of the lamp! However, some unscrupulous merchants take advantage of the unprofessional customers and consider the cost to use low-priced chips, so that customers can buy low-quality products at high unit prices, resulting in direct economics. Loss, and cause serious quality hidden dangers to LED lamps.

3. Copper wire pretends to be gold wire

Many LED manufacturers are trying to develop such as copper alloy, gold-clad silver alloy wire, and silver alloy wire to replace expensive gold wire. Although these alternatives are superior to gold wires in some characteristics, they are much worse in terms of chemical stability, such as silver wires and gold-clad silver alloy wires are susceptible to sulfur/chlorine/bromide corrosion, and copper wires are prone to oxidative sulfidation. For encapsulating silica gel similar to water-absorbent and breathable sponges, these alternatives make the bonding wire more susceptible to chemical corrosion, reduce the reliability of the light source, and make LED lamp beads more likely to break and die after a long time of use.

Tool Free Street Light Jpg

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

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

5. Poor thermal 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 decrease exponentially. Due to the high brightness requirements of LED street lights, the use environment is relatively harsh. If the heat dissipation is not solved properly, it will quickly lead to LED aging and lower stability.

6. Power failure

In terms of driving power, if the power supply fails, during the test and inspection process, there will be phenomena such as "whole light off", "partial damage", "individual LED lamp bead dead", and "whole light flickering falsely bright".

7. Security failure

Safety issues are also worthy of serious attention: there is no leakage protection for the street lamp power supply; the quality of the street lamp ballast is shoddy; the circuit breaker has not been tested for sensitivity check, and the rated tripping current is too large; the metal sheath of the cable is used as the PE main line The process is complicated and the reliability is low; the IP waterproof and dustproof level is too low.

8. There are substances harmful to the light source in the light

The blackening of LED light sources is a problem often encountered by major LED companies. Most materials in lamps need to be checked for substances that affect the life of the light source. The emergence of the above problems has a great impact on the performance of LED street lamps, and may even cause premature failure of LED street lights.

The following video is quoted from news on Youtube. A large number of new LED street lights just installed on a road in Detroit city flickered. Based on our experience, this is caused by a power failure.

Disadvantages of LED street lights:

1. The power of a single LED is low.

In order to obtain high power, multiple parallel connections are required.

2. Low color rendering index.

The color displayed under LED illumination is not as true as that of incandescent lamps. This is a technical issue that must be analyzed from the perspective of spectral distribution.

3. Spot.

The "yellow circle" problem is easily caused due to the defects in the manufacturing process of the white light LED itself and the matching error with the reflective cup or lens.

4. LED illumination uniformity problem

If the secondary optical design is not carried out, the illumination of LED lighting products is relatively concentrated, so the secondary optical design must be carried out to make the light intensity distribution map in the shape of a bat.

5. LED light decay problem

6. Compared with low-power LEDs, the light decay of high-power LED street lights will be much better.

But low-power LED heat dissipation is very small. However, high-power LEDs have problems that cannot be solved by heat dissipation, and the brightness will decrease significantly after heating, so the power cannot be increased. At present, LED lighting technology is becoming more and more mature, and the efficacy of high-power LED light sources has reached more than 100lm/W, which makes energy-saving transformation of urban street lighting possible.

The above content is provided by WOSEN. WOSEN is a professional manufacturer and supplier of Led Flood Light, Led Street Light, Led Solar Light, etc. For more information, please visit https://www.wosenled.com/ or contact admin@wosenled.com or WhatsApp +86-13425434349

Author:

Ms. Mandy

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admin@wosenled.com

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