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Comparison between LEDs and LEDs: What are SMD and SMD LEDs?

Here's an easy-to-understand comparison between LED chip numbers and sizes.

The different numbers correlate to the different physical dimensions of the chip. The numbers , , , etc correlate to the size of the chip in millimeters. Some LEDs are brighter than others and some give off more light per watt.

 

The LED chip you will need will depend on your project. Read below for more information.

Before you start, are you new to LEDs? A few resources:

LED Strip Light Product Selector Tool - Find the perfect strip light for your project. 

What are LED strip lights and what can they do?

LED Strip Light Examples and Ideas

Showdown: The Difference Between LED vs

LED strip lighting can be manufactured with a variety of LED chips. The numbers you see such as and refer to the size of the chip. The older style strips that have been popular for a few years now are the sizes seen above. Currently, there are even smaller and more efficient LED chips on the market with the sizes of , , , and . Each have benefits when used properly. No "one" chip can rule them all. 

So, what is the difference between SMD  and LEDs and why should you care?

 

SMD LED Flex Strip light

Simply put, these LED chips are called SMD because the dimensions of the chips are 5.0mm x 5.0mm. They have 3 LED diodes in one housing (sometimes called tri-chips), and are a lot brighter than individual LED chips.

These are examples of LED light strips:

They are used when you need slight illumination for your project area and especially RGB color changing lights. Theoretically, comparing the same number of chips, SMD LEDs can offer a light output 3 times that of the strips, and therefore the LED is well suited for lighting up areas that may be subject to high levels of ambient light. However, since they are larger in size, there are only so many you can fit onto the PCB. There are some brightness restraints when using the s in this way.

Though they produce more heat than smaller chips, it is still drastically lower than other lighting options. These types of LEDs require a thicker PCB to draw the heat away form the chips.

The 's are different from the  LEDs in that s can combine the three different chips to inside the housing to create millions of color variations.

While the chip can be used in single color applications, we have found the LEDs to be better for the RGB and the SMD LEDs in high density better for single color applications.

  

SMD LED Strip light

They are called SMD because the dimension of the chip is 3.5mm * 2.8mm. These LED chips (one LED per chip) are bright but not as bright as the side by side. However, when used in higher quantity can be brighter then a comparible strip of s.

These lights are great for TV backlighting, color splashing walls, accent lighting for crown molding and pictures, under tables and cabinets, bars, etc.

LEDs can be most cost effective, but will not be as bright when compared individually to a chip, but when there are 600 of them on a reel, they can be brighter than a strip.

Buying Tip: When comparing LED strip lighting between companies, if both competing strips are using the same chips, look at how many LED are on the strip and look for lumen output to determine brightness. 

Pay attention to how many LEDs there are per foot or meter. When searching for a bright LED strip light, make sure you compare apples to apples, as not all LED strips are made in the same way. 

Watch: YouTube Video showing how our LED strip lights come with 600 LEDs per reel Instead of 300

LEDs in various lighting projects

 

 

Other sizes: LED chips and LEDs in high brightnes

s LED strip lights

The UltraBright Series are of the Brightest LED strips in the world!

 

SMD LED chips

For more best smd led brandinformation, please contact us. We will provide professional answers.

LED chips

Though and SMD LEDs were the most popular on the market for strip lights, the LED market has changed rapidly over the past few years. 

Today, there are many LED chips available that are brighter and also more efficient. The  SMD LED chips in our High CRI UltraBright Series and SMD LED chips in our Architectural Ultra Bright and Design Series Ultra Bright LED strip lights are smaller and more efficient than their predecessors. Because the LED sizes are much smaller, we were able to fit many more of them onto the strip lights, thus creating blindingly bright LED strips. Our Industrial LED strip lights use a new advanced chip. 

 

 

 

So, What does all this mean?

Should I choose , , , , or some other size I have never heard about?

The size of the chip and how many chips you will need depend upon the use for which the LED strips are going to be used. We can help you design your project and select the strip and chip needed, for free!

We recommend doing an overview of your project and asking some main questions.

Start by deciding what you want/need the lighting for.

1. View our Buying Guide

2. What is the project? Do you want accent lighting, principal task lighting, color changing, lighting a display case, outdoor, etc?

3. Dimmable or non dimmable capability?

4. Which color do you want?

5. Do you require very high CRI

6. What brightness is needed?

7. Do you need it waterproofed?

When purchasing LEDs, please pay attention and compare the following: 

1. Look how many LEDs are on the reel or per foot and 

   the total lumen (brightness) of the LED strip light

2. Pay attention to the CRI ( Color Rendering Index ) - Our CRIs range between 80 - 95.

3. How many watts does the strip use?

4. Are the UL or ETL safety listed?

5. Are they dimmable?

6. How many ounces of copper do they use in their PCB to dissipate the heat? (we use 2-4oz)

7. What type of LED chips are used?

8. How are the LEDs binned? (will you get the same color every time you order?) 

   *Please be hesitant to purchase if the supplier does not offer this information, as these are important specifications to know when purchasing a quality product. 

 

LED strip lighting 101: Great and informative introduction pages: 

1. What is an LED strip light and what can they do?

2. What do I need to know before I choose an LED strip light?

3. LED Strip Light Examples and Ideas

4. LED strip light product comparison chart

5. How does Flexfire LEDs manufacture the highest quality LED strip lights? 

 

Have Questions? Our design experts are waiting to assist you with any question! 

 

What is the difference between LED package types such as , , and ?

When searching for LED products, you may come across different 4-digit designations for LED types. When you first come across these codes, you may be very confused as to what they mean! Read on to find out the difference between common LED types and what to look out for.

First of all, what is an LED package?

An LED lamp typically consists of multiple LEDs mounted onto a circuit board, commonly specified at certain density numbers such as 60 per meter for LED strips. Each of these LEDs, however, come in a variety of types called LED packages.

An LED package is a plastic casing that carries an LED chip and phosphor. The LED chip is the semiconductor material that emits light (blue light) and the phosphor material converts some of this light into green and red wavelengths. This mixture results in the white light that is emitted by the LED package.

A variety of LED package types

LED packages types are designated by four digit codes such as , , and . The first two digits refer to the width of the package, while the last two digits refer to its length, in tenths of a millimeter. So for example, a LED package has a width of 3.5 mm, and a length of 2.8 mm.

Generally speaking, a larger package can handle more power. This is because it has more surface area to dissipate heat. However, be aware that this is not always a hard and fast rule. The package, for example, has the same surface area dimensions as the , but is a newer package design that allows for much higher power levels. The package material (e.g. PPA vs PCT vs ceramic) and thermal design all have an influence on power capacity as well.

Generation 1 LEDs: and

The first generation of surface mount style LEDs come in and sizes. The typically contains a single 20 mA LED chip (approximately 0.06 Watts) and a typically contains three 20 mA LED chips (approximately 0.2 Watts). Therefore, a single LED package has the capacity of 3x LEDs.

In addition to the higher capacity, because the package typically has enough space for three different LED chips, it is a popular method of packaging RGB LEDs that require multiple colors. Of course, they can also be used to package single color white LEDs, in which three blue LED chips would be used.

There are some RGB LEDs, but these typically contain only one color per LED. This can cause additional issues where you may see some shadowing or color shifts due to the uneven spacing. Because the RGB LED chips are located in a single package for a LED, the single point source tends to work better.

Generation 2: and

The second generation of LED types saw an increase in power density. The LED is typically driven at 60 mA each (0.2 Watts) while the LED is typically driven at 150 mA each (0.5 Watts). Due to improvements in LED chip technology and package thermal design improvements, power levels at the LED level have increased significantly. In reality, some of the power levels of these LEDs will exceed the overall thermal capacity of the LED strip system since the thermal dissipation of an LED strip is limited due to the material and lack of heat sinking.

The second generation and LEDs also offer a lower profile. If you need to fit the LED strips in a location with limited vertical space, this can be an advantage, and in addition, this package design creates fewer issues with fringe yellowing.

Other package types

may be another LED package type that you come across. These LEDs are designed to be low power (approximately 20 mA each) and are commonly used in LCD backlighting applications where high LED count is needed for uniformity. Similarly, there are LED strip light products that have these LEDs in a diagonal pattern at a high density in order to create a uniform linear light source.

LEDs are also seen used on LED strips. Many of these products take advantage of the symmetrical circular light emission surface as they can be paired with secondary optics and lensing. LEDs are typically designed to be run at 300 mA or more (up to 1.0 Watts) but due to thermal concerns are typically not run at full capacity on LED strip products.

Bottom line

When choosing an LED strip, the LED type can be one of the most important aspects of its performance. Be sure to consider the quality and performance at the individual LED level in addition to the total quantity, as this can have an effect on overall performance.

When searching for LED products, you may come across different 4-digit designations for LED types. When you first come across these codes, you may be very confused as to what they mean! Read on to find out the difference between common LED types and what to look out for.An LED lamp typically consists of multiple LEDs mounted onto a circuit board, commonly specified at certain density numbers such as 60 per meter for LED strips. Each of these LEDs, however, come in a variety of types called LED packages.An LED package is a plastic casing that carries an LED chip and phosphor. The LED chip is the semiconductor material that emits light (blue light) and the phosphor material converts some of this light into green and red wavelengths. This mixture results in the white light that is emitted by the LED package.LED packages types are designated by four digit codes such as , , and . The first two digits refer to the width of the package, while the last two digits refer to its length, in tenths of a millimeter. So for example, a LED package has a width of 3.5 mm, and a length of 2.8 mm.Generally speaking, a larger package can handle more power. This is because it has more surface area to dissipate heat. However, be aware that this is not always a hard and fast rule. The package, for example, has the same surface area dimensions as the , but is a newer package design that allows for much higher power levels. The package material (e.g. PPA vs PCT vs ceramic) and thermal design all have an influence on power capacity as well.The first generation of surface mount style LEDs come in and sizes. The typically contains a single 20 mA LED chip (approximately 0.06 Watts) and a typically contains three 20 mA LED chips (approximately 0.2 Watts). Therefore, a single LED package has the capacity of 3x LEDs.In addition to the higher capacity, because the package typically has enough space for three different LED chips, it is a popular method of packaging RGB LEDs that require multiple colors. Of course, they can also be used to package single color white LEDs, in which three blue LED chips would be used.There are some RGB LEDs, but these typically contain only one color per LED. This can cause additional issues where you may see some shadowing or color shifts due to the uneven spacing. Because the RGB LED chips are located in a single package for a LED, the single point source tends to work better.The second generation of LED types saw an increase in power density. The LED is typically driven at 60 mA each (0.2 Watts) while the LED is typically driven at 150 mA each (0.5 Watts). Due to improvements in LED chip technology and package thermal design improvements, power levels at the LED level have increased significantly. In reality, some of the power levels of these LEDs will exceed the overall thermal capacity of the LED strip system since the thermal dissipation of an LED strip is limited due to the material and lack of heat sinking.The second generation and LEDs also offer a lower profile. If you need to fit the LED strips in a location with limited vertical space, this can be an advantage, and in addition, this package design creates fewer issues with fringe yellowing. may be another LED package type that you come across. These LEDs are designed to be low power (approximately 20 mA each) and are commonly used in LCD backlighting applications where high LED count is needed for uniformity. Similarly, there are LED strip light products that have these LEDs in a diagonal pattern at a high density in order to create a uniform linear light source. LEDs are also seen used on LED strips. Many of these products take advantage of the symmetrical circular light emission surface as they can be paired with secondary optics and lensing. LEDs are typically designed to be run at 300 mA or more (up to 1.0 Watts) but due to thermal concerns are typically not run at full capacity on LED strip products.When choosing an LED strip, the LED type can be one of the most important aspects of its performance. Be sure to consider the quality and performance at the individual LED level in addition to the total quantity, as this can have an effect on overall performance.

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