How to distinguish the quality and price of LED lighting products

(1) Voltage: LED uses low-voltage power supply, the power supply voltage is between 6-24V, depending on the product, so it is a safer power supply than using high-voltage power supply, especially suitable for public places.

(2) Performance: Energy consumption is reduced by 80% compared to incandescent lamps with the same efficacy.

(3) Applicability: Very small, each unit LED small piece is a square of 3-5 mm, so it can be prepared into various shapes of devices, and is suitable for a variable environment.

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

(5) Response time: The response time of the incandescent lamp is millisecond, and the response time of the LED lamp is nanosecond.

(6) Environmental pollution: no harmful metal mercury.

(7) Color: changing the current can change color, and the light-emitting diode can conveniently adjust the energy band structure and band gap of the material through chemical modification method to realize multi-color luminescence of red, yellow, green and blue.

(8) Price: The price of LED is relatively expensive. Compared with incandescent lamps, the price of several LEDs can be comparable to the price of an incandescent lamp.

2, LED light-emitting diodes and wafers

At present, there are only a few manufacturers capable of producing LED and LED lighting . Different manufacturers use different quality LEDs, which is an important reason for the different LED lighting prices. Taking red LED as an example, the price of ordinary red LED for general use is between 0.03-0.08 yuan, and the price of red LED suitable for producing LED lighting is between 0.12-0.36, and the higher quality is more than 3.2 yuan/only, generally not produced. LED lighting manufacturers of LED lighting are difficult to distinguish, not to mention consumers. Therefore, the products of LED lighting factories that use their own LED light-emitting diodes or have complete LED testing equipment are more guaranteed. The fundamentals of LED performance are listed below.

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

(2) Antistatic ability: LED with strong antistatic ability has long life and high price. LEDs with an antistatic greater than 700V are usually used for LED lighting.

(3) Wavelength: LEDs with the same wavelength, the same color, the price is high. Manufacturers without LED spectrophotometers are basically unable to produce pure color products.

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

(5) Illumination angle: LEDs with different uses have different illumination angles, special illumination angles, and higher prices.

(6) Life: The key to different qualities is life, and life is determined by light decay. Low light decay, long life, long life and high price.

(7) Wafer: The illuminant of the LED is a wafer, and the price of the wafer differs greatly. The prices of wafers in Japan and the United States are relatively high. Generally, the prices of wafers produced in Taiwan and the mainland of China are lower than those of Japan and the United States.

(8) Wafer size: The size of the wafer is expressed by the side length, and the quality of the large wafer LED is better than that of the small wafer. The price is proportional to the size of the wafer.

(9) Colloid: The colloid of ordinary LED is generally epoxy resin, and the LED with anti-ultraviolet and fire retardant is more expensive. The high-quality outdoor LED lighting should be resistant to ultraviolet rays and fire.

3, LED lighting design reliability is different, the price is different

Each product has a different design and is suitable for different purposes. The reliability design of LED lighting includes: electrical safety, fire safety, environmental safety, mechanical safety, health and 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 standard lags behind, but the country provides product qualification testing. LED lighting with international safety certification (such as GS, CE, UL, etc.) and national product quality certificate is expensive, because these products are reliable in safety design.

Consumers are paying attention to the authenticity of the certificate. There are not many manufacturers with international safety certification and national product certification. From the aspect of health, the price of products designed with non-toxic materials is high, especially for indoor LED lighting. Don't use cheap LED lighting with odor. At present, only a few LED manufacturers use non-toxic materials to produce, discerning methods. You can use your nose directly, and the smelly products are much cheaper than the odorless ones. Toxins like lead, mercury, and cadmium require professional analysis.

From the perspective of applicable environmental safety, there is a reliable dust-proof and moisture-proof design, and the price of LED products with fireproofing, ultraviolet protection and low-temperature cracking is high.

From the perspective of safe use time, it is more difficult for the average consumer to distinguish between the advantages and disadvantages. The reliability of the design and the quality of the components are all related to the price. For engineering lamps, do not choose products with low price and poor quality. For example, the choice of wires is different, the price is different. Some manufacturers use disassembled old electronic components, recycled plastics, recycled metal materials to produce LED lighting, these inferior LED lighting prices are more than 50% cheaper than normal LED lighting.