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Phosphor-Converted (PC) LEDs in the Yellow Amber Spectrum: Phosphor-converted (PC) LEDs offer a distinct approach to generating light in the yellow to amber spectrum (approximately 575–595 nm). Unlike direct emitting LEDs that use materials like AlGaInP, PC LEDs start with a highly efficient blue or UV InGaN LED chip and use a phosphor material to down-convert that light to a longer, desired wavelength. This method is particularly effective for overcoming the historical "yellow gap"—a region where direct semiconductor LEDs have traditionally struggled to achieve high efficiency.   Key Advantages of PC Amber LEDs: Superior Brightness: PC amber LEDs can be two to five times brighter than their direct-emitting counterparts. High Efficiency: They achieve commendable external quantum efficiencies of 30-40%, depending on temperature. Excellent Color Purity: This technology can produce light with high color purity, for instance, achieving 98.7% color purity at 595 nm. Good Stability: The color stability of these LEDs is excellent across varying drive currents and temperatures.   The following table outlines the key characteristics and applications for PC LEDs across four specific wavelength ranges. Wavelength range Typical color Key point Common Applications 590-595nm Amber A classic amber emission.  This range also includes the high-purity 595 nm PC amber LED achieving over 98% color purity Traffic signals, automotive turn signals, warning lights and architectural lighting.  588-592nm Amber(PC) A very common and commercially available PC Amber range. BESTLED, a major manufacturer, offers several products in this band, including the 2835 SMD LED, 5050 SMD LED， 5730 SMD LED and 3535 SMD LED series. These are typically driven at 20-350 mA with forward voltages around 3V. General lighting, signage and any application requiring a standardized amber. 583-588nm Gold yellow(PC) This range represents a shift towards a more yellowish amber. While specific commercial PC LED products for this narrow band are less frequently highlighted, it is a known target for color mixing in lighting systems to achieve tunable white light. Uesd in dynamic lighting systems and as a component for achieving specific color temperatures in white light applications.  570-580nm Yellow green PC(lemon green) The 575–580 nm wavelength range falls exactly in the transition band from yellow to yellow‑green, which is commonly referred to as lemon yellow. Compare with direct emits type, PC type of production will show higher brightness.  Specialized yellow signaling, machine vision and as a component in advanced color mixing systems.    In summary, phosphor-converted technology is a powerful and practical method for producing high brightness, efficient, and stable light in the challenging white SMD LED, yellow LED, amber LED or even cyan LED. The 588-592 nm range is particularly well-served by commercial products, while the other ranges provide specialized colors for various signaling, lighting, and LED display applications.

3W 810nm 3535 SMD Infrared LED: A Comparison of 30°, 60°, and 120° Dome Lenses   This family of SMD LED infrared LEDs is built on the standard High power LED 3535 ceramic substrate (3.5 mm × 3.5 mm) and delivers 3 watts of optical power at a peak wavelength of 810nm LED, which lies in the near infrared region invisible to the human eye. The package uses a silicone dome lens, gold wire bonding with 99.99% purity, and a ceramic base for excellent heat dissipation, ensuring stable performance across an operating temperature range of –40°C to +80°C. The only difference between the three variants is the beam angle of the dome lens, which fundamentally changes how the emitted light is distributed in space.   The 30° dome lens produces an extremely narrow and highly collimated beam. This design concentrates most of the infrared energy into a very small solid angle, resulting in the highest on‑axis radiant intensity among the three options, typically around 150 milliwatts per steradian. As a consequence, the illuminated spot is small, but the effective range is the longest. This makes the 30° variant the first choice for long distance surveillance cameras, iris and facial recognition systems, finger‑vein authentication, and any application that requires precise, laser‑like projection of infrared light over tens of metres. However, the narrow beam means that coverage area is limited, so it is not suitable for illuminating wide scenes.   The 60° dome lens strikes a middle ground between beam concentration and coverage. It offers a noticeably higher on‑axis intensity than wider angles, while still spreading the light over a moderate field of view. This balance makes it ideal for mid‑range CCTV cameras, machine vision systems that require a focused yet somewhat broadened illumination, spot lighting in stage or industrial settings, and medical instruments where a controlled but not overly tight beam is needed. The 60° version sacrifices some maximum range compared to the 30° but gains a more usable spot size for medium distance targets, making it the most versatile choice for many security and inspection applications.   The 120° dome lens produces a wide, diffuse flood beam that spreads infrared light evenly over a large area. On‑axis intensity is the lowest of the three, but the coverage area is the broadest. This lens is the standard for general‑purpose infrared illumination, such as fill‑light for CCTV cameras covering wide scenes, night vision lighting for parking lots or large rooms, panel lights, and machine vision setups that require uniform illumination across an entire work surface. The 120° beam is excellent for short‑range, wide angle applications where consistent lighting across the field is more important than peak intensity at a single point.   In terms of electrical characteristics, all three variants share the same typical forward voltage of 1.5 to 1.6 volts at a driving current of 1000 milliamperes, with a maximum forward voltage of 1.8 volts. The reverse current is negligible, and the peak wavelength is tightly centred at 810 nanometres IR LED with a tolerance of ±5 nanometres. Total radiant output power varies slightly with the lens design due to optical extraction efficiency, but typical values range from 300 to 800 milliwatts at rated current, with the 30° version often delivering the highest peak intensity per unit of power.   Choosing the right lens angle is simply a matter of matching the beam to the application. For extreme distance and pinpoint targeting, the 30° is unbeatable. For a compromise between reach and coverage, the 60° is the workhorse. For wide, uniform illumination of close‑range scenes, the 120° is the obvious choice. All three are available in the same compact 3535 SMD LED package, and many suppliers can also offer customised beam angles upon request, making this LED platform highly adaptable to a variety of infrared lighting needs.

When people choose the LED for their project, the most important thing is the power of SMD LED. Then what's the different from 0.2W to 3W LED at the same emitting color and wavelength?  At first glance, two green LEDs with the same wavelength (say, 520‑530nm) might look identical. But when one is rated at 0.2W and the other at 3W, they are very different components, it's designed for entirely different applications. The most key point is the brightness:  The 3W LED is not just a little brightet. it is 10 to 15 times brighter than the 0.2W version.A 0.2W green LED might produce 5‑10 lumens – enough for a status light or a small indicator.A 3W green LED produces 80‑120 lumens – bright enough for outdoor signage, floodlights, or high‑visibility signals. If you need visibility from a long distance and in daylight, 0.2w might cannot take that job. Try with 3W High power LED.  And also the Cost:  A 0.2W green LED costs pennies. A 3W green LED costs significantly more, not just the LED itself, but also the driver, the PCB, and the thermal management components. And then the Current and Voltage: The Driver Changes A 0.2W LED typically runs at 60mA and ~3.0V. You can drive it with a simple resistor and a 3.3V or 5V supply. A 3W LED requires 700‑750mA at ~3.6V. That is a constant‑current driver, not just a resistor. The driver must handle higher current and regulate it tightly to avoid thermal runaway. Heat – The Hidden Challenge This is where the biggest difference lies. 0.2W generates very little heat (~0.2W of thermal energy). The package itself can dissipate it without any special design. 3W generates around 2.5‑2.8W of heat. That is a lot of energy concentrated in a small area. And Package and Footprint 0.2W fits in compact SMD packages like 2835 SMD LED (2.8×3.5mm), 3528 SMD LED, 5730 SMD LED, 2016 SMD LED or 3014 SMD LED small, low profile. 3W usually comes in larger packages like 3535 (3.5×3.5mm) or 5050, with a large thermal pad underneath. You cannot simply swap a 0.2W LED for a 3W LED on the same PCB. The footprint is different, and the thermal pad needs a proper copper connection.    

During our production, we will produce some SMD LED or DIP LED with one single chip inside or multi chips inside. For multi chips LED, they will got different chip and wavelength inside the package. Why we put two same LED chips Inside one package? At first glance, putting two LED chips in a single package might seem unnecessary. Why not just use two separate LEDs? The answer comes down to performance, cost, and practicality – especially for high‑power applications like 1W yellow LEDs. Here are the key reasons. 1. Higher Brightness Without a Larger Footprint A single standard LED chip typically handles 20‑60mA. To get 350mA of drive current, you cannot simply push one chip that hard – it would overheat and fail quickly. By placing two chips inside one package, you split the current between them. Each chip runs comfortably within its safe range, while the combined output delivers much higher total brightness – all in the same physical space as a single LED. Result: More light, same board footprint. 2. Better Thermal Management Heat is the enemy of LED lifetime. One chip running at 350mA would get extremely hot. Two chips running at 175mA each generate less heat per chip – and the heat is spread across a larger die area. With a proper package design (e.g., a bottom heat sink or thermal pad), the dual‑chip configuration runs cooler and lasts longer than a single overdriven chip. Result: Longer life, more reliable operation. 3. Simplified Assembly and Lower Cost If you need the light output of two chips, you could mount two separate 60mA LEDs on your PCB. But that means: Two pick‑and‑place operations Twice the soldering points More board space Potential mismatch between two discrete components A single dual‑chip package places once, solders once, and takes up less space. Your assembly cost goes down – not up. Result: Lower manufacturing cost, simpler BOM. 4. Better Optical Consistency When you use two separate LEDs, their brightness and color can vary slightly – especially if they come from different bins or are placed at slightly different angles. A single package with two chips from the same production lot, mounted side by side on the same submount, gives uniform output. The light appears as one smooth source, not two overlapping spots. Result: Better light quality, no visible "splitting." We put two chips inside one package because it gives you: More light from the same space Better heat handling for longer life Lower assembly cost with fewer components Consistent optical performance batch after batch It is not just a technical trick – it is a smarter way to build high‑power LEDs without asking you to redesign your production line.    

BestLED factory is a semiconductor package factory. We order the raw material such as: gold wire, glue, LED frame, SMD LED chip ect. and put them together to produce a LED. Die Bonding also called die attach. It's a critical step in SMD LED or DIP LED packaging. That means the proess of attaching the individual LED chip to a LED frame.  In simple terms, die bonding gives LED chip a stable place to live, we using the die bonder to fixing the chip securely onto the LED frame so it can do its job of emitting lighti reliably. Why die bonding matters?  Mechanical stability: That keeps the chip from shifting during wire bonding, phosphor dispensing and encapsulation.  Heat dissipation: Most LED heat flows through the die attach layer. Poor thermal performance accelerates lumen depreciation and shortens lifetime.  Electrical connection: Vertical structure LEDs require bottom, side electrical contact, the die attach adhesive serves as the electrical path.  Think of it this way: The LED chip is like a tiny heart. And die bonding is the step that connects it to the body(LED frame). It's not just about making the electrical connection work, it will also need a good heat dissipatin. That's how we get LEDs that are both bright and long lifespan. 

LED Chip Packaging Process Explained: Material Selection, Die Bonding, Wire Bonding, and Encapsulation These key step will Ensuring High Efficacy and Long Lifetime for SMD LED and LED Lamps.  LED chip packaging is the core process that determines luminous efficacy, service life, and thermal performance. It essentially puts a “protective coat” on the semiconductor chip while maximizing the conversion of electrical energy into light. Every step – from material selection to process control – must be strictly managed to produce high‑quality LED chips. 1. Material Selection Before Packaging – The Foundation The quality of core components directly determines the final product’s performance. LED chip – Choose the appropriate power, wavelength, and brightness grade based on the application. Pre‑inspect chips for scratches, electrode misalignment, and ensure that photoelectric parameters meet batch specifications.  Leadframe / bracket – For general small and mid‑power LEDs, PPA or PMC (thermoplastic) brackets are common. High‑power LEDs require ceramic or aluminum‑based brackets for better heat dissipation. The bracket plating must be flat and oxidation‑free to avoid soldering issues later. Packaging auxiliary materials – High‑transparency epoxy or silicone, gold bonding wire (purity ≥99.99%), thermal grease, etc. The encapsulant’s refractive index should match that of the chip to minimize light loss. 2. The Four Core Packaging Processes Step 1: Die Bonding Use conductive or insulating adhesive to precisely attach the LED chip to the center of the bracket cup. The adhesive amount should be controlled to a height of ½ to ⅔ of the chip thickness – avoid overflow that could block the light‑emitting area. After die bonding, a constant‑temperature bake (typically 1–2 hours) cures the adhesive fully, ensuring a strong attachment. When we need a white SMD LED, we produe it with blue LED chip inside and phosphor cover on the top. When we need a green SMD LED, we produce the SMD LED with green LED chip inside and same as other LED, such as IR LED, UV LED or Amber, yellow LED.  Step 2: Wire Bonding A gold ball bonder connects the chip’s positive and negative electrodes to the bracket leads. The gold wire loop should have an angle of 15–25°, with a pull strength ≥5g. This prevents loose bonds or broken wires that cause dead LEDs. Wire bonding is the most precision‑demanding step in the process – placement error must be within ±2 microns. Step 3: Encapsulation (Phosphor / Silicone) Inject the prepared encapsulant (epoxy or silicone) into the bracket cup, completely covering the chip and gold wires. The surface must be flat and bubble‑free. For white LEDs, a precisely proportioned phosphor powder is mixed into the encapsulant before dispensing. Uniform phosphor settling is critical for consistent correlated color temperature (CCT). Step 4: Curing, Sorting & Binning After encapsulation, the LEDs undergo a low‑temperature bake (80°C for 1 hour) followed by a high‑temperature bake (120°C for 3–4 hours) to fully cure the material. Finally, sorting equipment classifies the LEDs by luminous flux, CCT, and forward voltage. Tight binning ensures that all LEDs in a batch have consistent photoelectric parameters. 3. Reliability Testing: The Final Quality Gate Random samples from each batch are subjected to: Aging test: 1000 hours at 85°C / 85% RH under power. Lumen depreciation <3% is considered passing. Thermal shock test – Alternating between -40°C and 100°C to check for cracks or dead LEDs. Only lots that pass these tests are released for shipment. 4. Looking Forward With the rise of Mini‑LED and Micro‑LED technologies, packaging processes are evolving toward miniaturization and integration. However, the fundamental principles of die bonding, wire bonding, and encapsulation remain universal. Mastering every step is the only way to build LED chips that deliver high efficacy and long life.

A single-chip SMD LED is fine for basi indicators. But why 3 chips in one 5050 SMD LED Package? Because when you need real power without increasing board space. the 3 chips configuration is the answer. With three chips inside one 5050 LED SMT Package. You get more light per square millimeter, which means fewer LEDs on your PCB board, lower assembly cost and clearner design.  In BEST LED factory, we will make wavelength consistency. We bin every LED to a tight wavelength range and even according the customer's required. For horticulture and medical applications. This consistency is critical.  Secondly, we will matched chips. All three chips inside a single 5050 are sourced from the same production lot and matched for forward  voltage and radiant flux. That means uniform brightness and no "hot spots" across the die.  And then thermal management. Som of our 5050 SMD package includes a thermal pad underneath. Combined with a properly designed PCB, this LED can run at higher currents without overheating, essential for grow lights and high density arrays.  Finally, The reliable lighting. Because the red SMD LED is a direct emission red LED. There is no phosphor degradation over time. The color stays stable for the life of the LED. 

What is a phosphor-converted pink LED? Think of it as the same technology used to make white LEDs. But tuned for pink.  A high efficiency blue LED chip is coated with a proprietary phoshpor mixture. The blue light excites the phosphor, which re-emits light in the pink spectrum. By ajusting the phosphor formulation, we can dial in exactly the shade of pink you want from soft pastel pink to vibrant magenta. Pink LEDs are everywhere: beauty mirrors, mood light, signage, children's toys and even horticultural accent lights. But not all the pink LEDs are created equal.  There are two ways to make a pink LED.  Direct emission by chipL Using a native pink LED chip. We just put the pink LED chip inside the package and light up, in this way, the chip material is rare and expensive.  Or phosphor-converted, we also name it as PC Pink LED: Starting with a blue or near UV chip and adding a phosphor blend that emits pink light.  BESTLED factory are able to produce it different package size, such as 2835 SMD LED pink LED, 5mm LED Lamps pink LED, 3528 SMD LED pink LED, 3mm through-hole LED pink LED, 5050 SMD LED pink LED ect.     

As we know, there are two way to produce a pink LED: One for chip emits direct pink LED. And other one for phosphor converted pink LED. No matter the 5mm LED lamps, through-hole LED or SMD LED type. Both of these way are all available for Pink LED production.  Then for most of LED project or application, why choose phosphor converted over direct pink? There are the detail as follow:  For the efficiency to direct emission pink, brightness will be much lower than phosphor-converted pink. Becuaes the blue chip will got higher brightness and the phosphor will make it brighter. And the also most improtant part: The cost.  It will be higher for relable parts if we use the LED chip for direct emission pink LED. And it will be much more competitive price in PC pink LED because it's produce by blue LED chip inside and covered by phosphor power.  In short: phosphor converted pink LED give you better performance, longer light and more color options at a lower cost. 

1. Simpler BOM – No external driver, no microcontroller, no programming header. One component does it all. 2. Lower assembly cost – Fewer parts mean faster pick-and-place and less board complexity. 3. Consistent performance – The IC is factory, calibrated, so every LED behaves the same – no batch to batch timing variation. 4. Available in multiple package sizes – 5mm round, 3mm round, 3528 SMD, 5050 SMD, etc. Tell us your preferred footprint. 5. Fast, flash and slowflash options – Order the speed that matches your product’s personality. Which One Should You Choose? Ask yourself two questions: 1, What mood do I want to create? Energetic, playful → Fast-flash; Relaxed, ambient → Slow-flash; 2, Where will the product be used? Close to the user’s eyes (such as: desk lamp, night light) → Slow-flash is usually more comfortable; At a distance or in a noisy environment (such as: toy, sign) → Fast-flash grabs attention better. Still not sure? Order samples of both speeds and test them in your actual prototype. Seeing the effect in person makes the choice easy.  

One component, endless color cycles--No programming needed. Have you ever wanted to add colorful auto-cycling RGB lighting to a product but don't want to write any code, add a microcontroller or deal with external drivers? We have good news!  RGB LED means there are Red, blue and green LED together in a single LED. SMD LED or DIP LED Lamps package at least three chips inside to emits at least three color, red, green and blue. If we add an build-in IC inside to control the chips, it will be flashing LED. When we producee it with SMD package, the LED is SMD Flashing LED and if we produce it with LED Lamps, it will be through-hole Flashing LED.  Our built-in IC RGB LEDs do all the work for you. Just apply power and the LED automatically cycles through a preset sequence of colors: red→green→blue→green→purple...and so on continuously.  No external controller, no programming and no PWM signals. Just a clean, self-contained lighting effect that runs the moment you turn it on.   

There will have so many problem to the LED factory. Such as, rising material costs, tight margins, tough comptitors.. But when you ask the one who've been burned before and they'll tell you the real nightmare is something else entirely. It's the moment you open a new package of LED, you see the same part number, the same spec sheet and even the same supplile the same looks. The color will still have a little different from the last batch. It's not dramatically, but enough.       

In our factory, we never encourage customers to simply drive prices down at all costs. Instead, we work with our customer to do those things as follow to save the cost: 1, Analyze the application scenario: Where your SMD LED or LED lamps be used? what's your required for reliability, emitting color and lifespan? 2, Recommend the best matching solution: Indentify the most cost-effective LED configuration without compromising critical performance; 3, Provide verified performance data: Luminous efficacy, lumen depreciation, thermal resistance and ESD capability; 4, Ensure strict batch to batch consistency: Even wtih cost effective products, we guarantee stable quality across batches.  We do all these things becuase we always know that your product's success is the foundation of our long-term partnership.  For 2835 SMD LED, 5050 SMD LED, IR LED or 5mm green through-hole LED, oval LED, we all have solution for your project.  If you're struggling with cost pressure or looking to optimize your BOM list without sacrificing quality, feel free to reach out! Let's discuss your specific product and explore  smarter ways to reduce costs.  Cost reduction shouldn't be a gamble, it should be carefully calculated engineering decision. We deliver stable, reliable and application matched LED solutions.

If you have ever worked with LEDs in your project, you probably faced this nightmare, especially the white SMD LED or white through-hole LED: There are different color at the same order or for the same goods, even the part number is the same. Some slightly warmer and othe other cooler, or some got deeper light.  One has a subtle blue tint under low current and the other doesn't. Or even worse, your finished project are returned because the color doesn't match acorss the prodution run.  This isn't just a quality or brand problem. It's a BIN CONTROL problem.  At BESTLED factory, we belivev that tight bin control is the invisible foundation of every reliable LED lighting product. Here's why it matters and how are make sure you never have to worry about inonsistency again.  The most important part of light emitting diode is the chip. Which is a semiconductor device. Due to inherent manufacturing variations, LED can differ slightly in color(color temperature), brightness, forward voltage and wavelength. We will sort "bin" LED after production based on these paramters.  No matter the white SMD LED or other LED such as green SMD LED, Blue SMD LED, Red SMD LED. Bin control is the discipline of selecting and supplying LEDs within a nattow range of these bins, which ensuring that every LED you receive behaves like its sibling. 

1mA is a small current for standard lighting emitting diode. Does it work for our LED?  We need to confirm that yes, 1mA is enough to make a SMD LED or DIP LED light up. However, it will likely be dim. Because most of LED chip need more current to dirve it up.  Most of common indicator LEDs (such as 5mm white through-hole LED, Yellow LED, 5mm green Throguh-hole LED, Amber LED, 2835 SMD LED ect.) are rated for 20mA operation current.  For those LED that have power within 0.1W, 10-15mA will make LED very bright and perfectly visible. At 5mA, the LED is clearly lit but notieably dimmer and with 1mA-2mA, our ELD will glow, but it will be fairly dim. It is easily visible in a dark room, but might be hard to see in direct sunlight or a bright office.    So in summary, 1mA will be able to light up the LED and make it work? Yes, as long as the voltage is high enough.  And is it safe? Yes, it's well below the danger zone for a standard LED. 

The cost are getting out of hand. This is the key question for most of LED factory in LED market. And most of people will go with cheaper LEDs for the cost reduction.  I understand the if you manufacture lighting, you're under constant pressure to cut costs. Competition customers keep asking for lower price. At the same time, the raw material costs keep climbing and margins are shrinking by the day. So it's only natural to look at the biggest line item on your BOM list and think, "what if we went with something cheaper?"   We been working on SMD LED and DIP LED market for more than 20 years. And I've seen that approach go wrong more often than it goes right.  A few cents saved per LED turns into skyrocketing failure rates, non-stop complaints and brand reputation that takes years to rebuild.  No matter UV LED, Amber LED, white LED or IR LED. Cost reduction is a good thing as long as you're not just swapping in cheaper parts and calling a day.    What real cost reduction for SMD LED and DIP LED(2835 SMD LED or 5mm LED) looks like:  The ultimate goal of cost reduction is not to minimize the price of individual single parts, but to lower the total cost of ownership, which include the procurement costs, production cost, after-sales costs and brand loss costs.   

Dear Valued Client, Season’s Greetings and thanks for your continued trust and support in our company. As the Chinese New Year of 2026 coming soon. Our company extends our warmest wishes to you a joyful New Year, prosperous business and good fortune in the year of the Horse! Our company will be closed from February 6th to 2026 to February 25th 2026. If you have urgent orders to be processed, we kindly  request that you plan ahead accordingly. We apologize for any inconvenience this way cause and appreciate your understanding and cooperation. Please note that orders received after January 30th 2026 will be scheduled for production after holiday period. Regular business operations will resume on February 26th 2026. Wishing you a happy New Year filled with joy, happiness and prosperity for you and your family!   Best regards Shenzhen BEST LED Opto-electronic Co.,LTD 2026.01.22

Understanding Red SMD LEDs: A Guide to Common Packages (2835, 5050, 5730, etc.) Red Surface-Mount Device (SMD) LEDs are fundamental components in modern lighting and indication, prized for their efficiency, compact size, and versatility. The "package" size (e.g., 2835) critically determines the LED's physical dimensions, power handling, light output, and optimal application. Here’s a breakdown of popular red SMD LED packages. Key Characteristics of Red SMD LEDs Before diving into packages, remember two key specs for red LEDs: Typical Wavelength: ~620-630nm (standard red) to ~660nm (deep red) Forward Voltage (Vf): Generally lower than white/blue LEDs, typically 1.8V - 2.2V.

As we know, CRI means color rendering index, which is Ra. This is a traditional color rendering index system in LED market. Which is a very important point for the SMD LED quality or DIP LED Lamps quality. It used to measure the accuracy of color reproduction under a light source.  Normally Ra is the average of R1-R8 and the value range is 0-100. When we Ra>80, means the  LED sutable for basic commercial use. When the Ra>90 that indicated this is a high quality light.  However, the key point for the Ra is the core limatation: It's only considers"tint color/pastel colors", not for red or saturated colors.    We metioned the R1-R8 before. Now we need to bring an other index, which is R9. It's the most critical yet most frequently overlooked metric in the CRI system. Specifically test the ability to deep red LED. Human skin tones, food, wood and leather all rely heavily on good R9 performance. Some people thing that when R9 and R12 value being close to 90 means the LED have a super high quality on the lighting result.    For these value, we discussed it in white SMD LED, white DIP LED or full spectrum LED. 

In the LED market, both 2835 SMD LED and 5730 SMD LED are popular SMD LED package in LED lighting project.  From the name we can tell, the size of 2835 LED will be 2.8x3.5mm and 5730 LED is 5.7x3.0mm. Compare with 2835 SMT LED, the 5730 is a step up in power class. Normally 1 single 5730 LED are able to replace 2-4 standard 2835 LEDs in terms of total light output with the same chip.  Simplifying circuit design and reducing component count, but with greater thermal management demands.  The 2835 LED can be Red SMD LED, Green SMD LED, Yellow LED or IR LED. It's engineered for efficienxy and density. Its superior thermal management design allows it to be driven relatively hard while remaining cool, making it ideal for packing many LEDs close togehter to create uniform, high density light panels.  Same as that, 5730 are also available in IR LED, Amber LED ect. It's designed for higher single unit output. It's larget size accommodates a bigger chip and provides more surface area, aiming to deliver more lumens from a single point. In short, choose the 2835 for small, dense and efficient designs where uniformity and thermal management in a compact space are key. Choose the 5730 for larger, brighter and simpler designs where maximizing light output from fewer points is the priority.