How to distinguish the quality and price of LED lighting products

Generally, LED light-emitting tubes are not produced.

It is difficult for lighting manufacturers to distinguish, let alone consumers. Therefore, it is better to choose to produce LED light-emitting diodes by yourself.

Or the products of LED lighting factories with complete LED testing equipment are more reliable. The basics of LED performance are listed below.

1. LED light source

Features

(1) Voltage: LED uses low voltage power supply power supply

, the supply voltage is between 6-24V, which varies according to the product, so it is a better choice than using a high voltage power supply

又名高压发生器，,一般是指输出电压在五千伏特以上的电源，一般高压电源的输出电压可达几万伏，甚至高达几十万伏特或更高。 Safer power supply, especially suitable for public places.

(2) Efficiency: Energy consumption is 80% less than that of an incandescent lamp with the same luminous efficacy.

(3) Applicability: It is very small, and each unit LED chip is 3-5 mm square, so it can be prepared into devices of various shapes and is suitable for changing environments.

(4) Stability: 100,000 hours, light decay is 50% of the initial value.

(5) Response time: The response time of an incandescent lamp is in milliseconds, while the response time of an LED lamp is in nanoseconds.

(6) Environmental pollution: No harmful metallic mercury.

(7) Color: Changing the current can change the color, light-emitting diode

The energy band structure and band gap of the material can be conveniently adjusted through chemical modification methods to achieve multi-color luminescence of red, yellow, green, blue and orange.

(8) Price: LEDs are relatively expensive compared to incandescent lamps. The price of a few LEDs can be comparable to that of one incandescent lamp.

2. LED light emitting diodes and chips

At present, there are only a few manufacturers capable of producing LEDs and LED lighting. Different manufacturers use different quality LEDs, which is an important reason for the different prices of LED lighting. Take red LEDs as an example. The price of ordinary red LEDs for general use is between 0.03-0.08 yuan, while the price of red LEDs suitable for producing LED lighting is between 0.12-0.36 yuan. The higher quality ones are more than 3.2 yuan per piece. Generally, LED lighting manufacturers that do not produce LED light-emitting tubes find it difficult to distinguish, let alone consumers. Therefore, it is more reliable to choose LED lighting manufacturers that produce their own LED light-emitting diodes or have complete LED testing equipment. The basic aspects of LED performance are listed below.

(1) Brightness: The brightness of LED is different, and the price is different.

(2) Antistatic ability: LEDs with strong antistatic ability have long life and are therefore expensive. Generally, only LEDs with antistatic ability greater than 700V can be used in LED lighting.

(3) Wavelength: LEDs with the same wavelength and color are more expensive. Manufacturers without LED spectrometers are basically unable to produce products with pure colors.

(4) Leakage current: LED is a unidirectional conductive light source. If there is a reverse current, it is called leakage current. LEDs with large leakage current have short life and low price.

(5) Lighting angle: LEDs with different uses have different light-emitting angles. LEDs with special light-emitting angles have higher prices.

(6) Lifespan: The key to different qualities is lifespan, which is determined by light decay. Smaller light decay means longer lifespan, while longer lifespan means higher price.

(7) Chip: The light source of LED is the chip. Different chips have different prices. The price of chips in Japan and the United States is relatively high. Generally, the price of chips produced in Taiwan and mainland China is lower than that in Japan and the United States.

(8) Chip size: The size of the chip is expressed by the side length. The quality of LEDs with large chips is better than that of LEDs with small chips. The price is proportional to the chip size.

(9) Colloid: The colloid of ordinary LEDs is generally epoxy resin. LEDs with anti-UV and fire retardants are more expensive. High-quality outdoor LED lighting should be anti-UV and fireproof.

3. The design reliability and price of LED lighting are different

Each product has a different design and is suitable for different purposes. The reliability design of LED lighting includes factors such as electrical safety, fire safety, applicable environmental safety, mechanical safety, health safety, and safe use time.

From the perspective of electrical safety, it should comply with relevant international and national standards. Since LED is a new product, China's national standards lag behind, but the country provides product qualification tests. LED lighting with international safety certification (such as GS, CE, UL, etc.) and national product quality certificates are more expensive because these products are reliable in safety design.

Consumers should be careful to identify the authenticity of the certificate. There are not many manufacturers with international safety certification and national product certificates. From the health aspect, products designed with non-toxic materials are more expensive, especially indoor LED lighting. Don't be greedy for cheap LED lighting with odor. Currently, only a few LED manufacturers use non-toxic materials. You can distinguish them directly with your nose. Products with odor are much cheaper than those without odor. Toxins such as lead, mercury, and cadmium need to be analyzed by professionals.

From the perspective of environmental safety, LED products with reliable dust and moisture-proof design, fire-proof, UV-proof, and low-temperature crack-proof materials are more expensive.

From the perspective of safe use time, it is difficult for ordinary consumers to distinguish between good and bad. The reliability of the design and the quality of the components are closely related to the price. For engineering lamps, do not choose low-priced and low-quality products. For example, the price varies depending on the wires used. Some manufacturers use dismantled old electronic components, recycled plastics, and recycled metal materials to produce LED lamps. The price of these low-quality LED lamps is more than 50% cheaper than normal LED lamps.