What do these numbers on the LED lights mean?

When choose and buy LED lights, we are able to frequently notice some numbers from the product information like 2835, 3528, 5630, 5050 etc. What do all these numbers signify? What are the differences between them?

Actually, all these numbers are utilized to point out the dimensions of SMD LEDs that usually mounted on the LED strips, LED tapes, TV backlights, LED bulbs and other LED products. One example is 2835 means the length of the SMD2835 LED is 2.8mm and the width is 3.5mm. But it is necessary to underline that all these are the metric unit. The following is specific explanations:

3528: the dimensions of SMD3528 LED is 3.5*2.8*1.9mm, the last number 1.9mm is the value of thickness. Generally, the operating current of SMD3528 LEDs is 20mA, and the maximum is 40mA. In addition, 3528 also called as 1210 in countries and regions where British unit is used.

2835: the size is 3*1.4*0.8mm. It is possible to mix up 2835 and 3528, for they are really similar and their PCB is normally universal. Compare with SMD3528LEDs, SMD2835 LEDs have higher brightness, better heat dissipation, as well as cheaper. Consequently, SMD2835 LEDs are occupying a huge market share nowadays.

5050: The size is 5*5*1.6mm. The workmanship of SMD5050 LED is excellent, for an SMD5050 LED has 3 chips. Based on this feature, producers install 3 chips of various colours are red, green and blue respectively in a LED. And then, we are able to realize change colours by control the current of different chips, which is the RGB LED.

5630: The size is 5.6*3*0.9mm. The SMD5630 LED has high lumination, even light, low light decay, and long lifetime. According to the power of, SMD5630 LEDs are usually categorized as 0.2W, 0.3W and 0.5W, of which a 0.5W SMD5630 LED can reach 60lm.

SMD LEDs

There are still have a large amount of SMD LED with other sizes like 3030, 4014, 7030, 8520 etc. Nowadays we should know that all these numbers are the size of SMD LEDs. LED lights suppliers will pick suitable LEDs depending on the various demands of customers. For example, as the LED tapes manufacturer, we will select 0.5W SMD5630 LED when some clients asked for high brightness. But if some demand the even light and higher CRI, the SMD2835 LED certainly is the better choice.

For more information about specifications of LEDs, please read another post that talks about common specifications of LEDs. The web link is as follow:

Let you know the LED specifications and parameters in three minutes.