Numbers and LEDs: What Does 2835, 3528, and 5050 Mean?

While purchasing LED strips, you will find numbers like 2835, 3528, and 5050 in the specification, which may need clarification. 

These numbers indicate the size of the LED. But what do these numbers mean, and why are they important?

LED numbers are the four-digit numbers indicating the size of the LED. 

Different LED sizes are available in the market, of which 2835, 3528, and 5050 are the most common. 

2835 means the chip with this numbering has a 2.8mm * 3.5mm dimension. 

And likewise, 3528 and 5050 indicate the chip dimension of 3.5mm * 2.8 mm and 5.0mm * 5.0mm, respectively. 

Besides just the sizes, these numbers also represent the different properties of the LEDs.

This article will cover LED numbers, their meaning, properties, and how they differ. So let’s explore-

What Are LED Numbers?

LED numbers indicate the size of the LED in millimeters. It is a four-digit number, of which the first two digits represent the width of the LED. 

And the last two digits tell you its length. 

These numbers are usually expressed with the initial ‘SMD,’ which means ‘Surface Mounted Device.’

For example- SMD2835 implies the width of the LED is 2.8 millimeters, and its length is 3.5 millimeters. 

So, the larger the number, the more prominent the LED size. 

LEDs can be of different sizes, among which 2835, 3528, and 5050 are the most common.Why Are LED Numbers Important?

The lighting effect of a LED fixture, like LED strips, depends much on the size of the chips. A bigger chip provides more prominent illumination than a smaller chip.

 So, LED numbers are essential, as they indicate LED chip sizes.

With the LED numbers in the specifications, you can quickly determine the lighting effect of the fixture. 

For example- an SMD5050 LED strip has bigger LEDs than SMD2835. 

So, the illumination of SMD5050 is brighter than SMD2835. 

Thus, these numbers tell you about the LED’s brightness. 

Again LED numbers let you know the number of LEDs that can fit per foot of PCB. 

And a larger LED size means only a few chips can fit in the PCB.

These numbers further indicate the LED’s power, intensity, beam angle, and efficiency. 

However, these values may vary with the LED density and brands. 

Different brands have standardized values for specific SMD numbers.

For example- a 5050SMD 120LEDs single color LED strip of LEDYi has a power of 28.8 W and a beam angle of 120 degrees. 

Thus, LED numbers are essential to know the chip size, brightness, and power consumption.

 To sum up, these numbers give you an overall idea of the lighting.

What is SMD in LED?

To understand the term ‘SMD’ better, first, let us know about the construction of the LED strips. 

In a LED strip, the LEDs are mounted into a thin printed circuit board, PCB, without wirings. 

As these LED chips are directly mounted on the board’s surface, these chips are called surface-mounted devices or SMD. 

That is why the term SMD is often used as synonymous with LEDs. 

But this is incorrect, as there are non-SMD LEDs also like- COB and MCOB.

The term SMD is used in the LEDs along with four-digit numbers to indicate the size of the LED chips. 

Thus, SMD 2835, SMD3528, and SMD5050 show different LED sizes. 

However, all these numbers have specific features that you will know in the below portion of the article.

What is SMD2835?

SMD2835 means the width of the LED is 2.8 mm, and its length is 3.5mm. 

These LEDs have an identical appearance to the SMD 3285 chips.

 The latest technology in 2835 makes it significantly more reliable and steady.

 These LEDs are more energy efficient and brighter in comparison to SMD 3285. 

For LED strips, SMD 2835 is a trendy size. Additionally, it includes high-output LEDs with a long life.

What is SMD3528?

Surface Mounted Devices, like the SMD 3528, are considerably smaller. 

It is 3.5mm wide and 2.8mm in length. 

These LEDs include one diode in each LED. 

Due to the smaller size of these chips, you can add more of these chips per foot of the PCB. 

These chips are usually used in LED strips of 60 LEDs/meter. 

However, LEDYi SM3528 LED strips are available in 60LEDs, 120LEDs, 180LEDs, and 240LEDs per meter. 

Besides, we have customization options also!

What is SMD5050?

When discussing the SMD5050, they are as popular as the SMD 3528. SMD 5050 is 5.0mm x 5.0mm in size. 

This refers to a tri-chip, a three-diode in one LED. 

And so an SMD5050 LED produces three times more light than a one-diode SMD3528 chip. 

And because of this, it is essentially used as “task lighting.”

 These types of lighting are employed in areas where you are working— a kitchen and a study room.

These chips are suitable for RGB lighting. 

With the three-in-one chip of SMD5050, you can make millions of hues in RGB lighting.

 Besides, SMD 5050 is ideal for general lighting, such as replacing bright fluorescent lighting in homes, bars, restaurants, hotels, and other institutions.

Do Bigger LED Chips Use More Electricity?

The chip size is related to electricity consumption, but the idea that bigger LED chips use more electricity is partly true. 

It highly depends on the technology rather than just the chip sizes.

 Let me explain the concept with an example of our LEDYi 60 LEDs LED strips for different SMDs:

As you can see, SMD5050 uses more electricity, which is ok as it has a larger chip size. 

But between SMD2835 and SMD3528, SMD2835 is the smallest in size. 

So, it is supposed to consume less electricity. 

But in reality, 2835 produces more brightness, so it uses more electricity than 3528.

Higher Density vs. Bigger LED Chips: What Is Better?

We discussed size throughout the article, but you might wonder if density is essential. 

The term “density” might confuse you, but it simply refers to the number of LED chips on the strip per meter.

Density = Number of Chips * Meter

Now, bigger LED chips give a brighter light. 

But with bigger chips, you can fit only a few SMDs per meter of your LED strip.

 But how are dense LED chips better?

When you have a denser LED chip, it will provide brighter and more uniform lighting. 

For example- about 120 LED chips as small as SMD2835 can easily fit in a one-meter strip. 

Thus, it gives much brighter illumination- up to 2,600 lumens per meter! 

It will further provide more uniformity than less dense lighting. In contrast, you can fit 30 to 60 LEDs in one meter SMD5050.

However, it doesn’t mean you must choose highly dense LED strips for uniformity.

Bigger chips can also bring uniformity, for this cove lighting works best.