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The light sheet refers to an LED backlight source. The first LED backlight product uses LED lamp beads.

LED lamp beads are the abbreviation of LED for short, which is a popular name.

Selection skills

1. Brightness LEDs have different brightness and different prices. LEDs used in LED luminaires shall meet the Class I standards for laser class.

2. Antistatic ability LEDs with strong antistatic ability have a long life and therefore high price. Generally, LEDs with an antistatic greater than 700V can be used for LED lighting.

3. LEDs with the same wavelength and wavelength have the same color. If the color is required to be the same, the price is high. It is difficult for manufacturers without LED spectrophotometers to produce products with pure colors.

4. Leakage current LED is a unidirectional conductive light-emitting body. If there is reverse current, it is called leakage. LED with large leakage current has short life and low price.

5. LEDs with different lighting angles have different lighting angles. Special lighting angle, the price is higher. Such as full diffusion angle, the price is higher.

6. life is the key to different quality is life, life is determined by light decay. Low light decay, long life, long life and high price.

7. Wafer The luminous body of LED is wafer. Different wafers have very different prices. Chips in Japan and the United States are more expensive. Generally, the prices of chips in Taiwan and China are lower than those in Japan and the United States.

8. Wafer size The size of the wafer is represented by the length of the side. The quality of the LED of the large wafer is better than that of the small wafer. The price is directly proportional to the chip size.

9. Colloid The colloid of ordinary LED is generally epoxy resin. LEDs with anti-ultraviolet and fireproofing agents are more expensive. High-quality outdoor LED lighting should be anti-ultraviolet and fireproof.

How many milliamp currents does an average led have?

LED lamp beads use low-voltage power supply, the power supply voltage is between 2-4V, which varies according to different products, so it is driven by a safer power source than high-voltage power supply, especially suitable for public places;

Current: The working current is between 0-15mA, the brightness becomes brighter as the current increases, the brightness of the LED lamp beads is different, and the power.

Lamp beads: general brightness is 60-70lm; bulbs: general brightness is 80-90lm.

1W red light, the brightness is generally 30-40lm; 1W green light, the brightness is generally 60-80lm; 1W yellow light, the brightness is generally 30-50lm; 1W blue light, the brightness is generally 20-30lm.

Note: 1W brightness is 60-110lm; 3W brightness is as high as 240lm; 5W-300W is an integrated chip, which is packaged in series / parallel, mainly depending on how much current, voltage, and several strings are parallel.