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Industrial-leading high CRI technology
In all parameters of an LED, CRI (Color Rendering Index) plays a most important role since it determines the illumination quality essentially. Since 2013, Yujileds dedicates to providing outstanding quality LED starting with high CRI technology, and till today it still offers excellent color rendition LED to the industrial and consumer markets.
Yujileds BC series LED is based on the efficient blue (typical 450nm) die, mixing with Yuji advanced phosphors and specifically designed spectral recipes. Although there are more and more nominal “high CRI LED” manufacturers on the market, after relevant test and analysis, it is proud to say that Yujileds BC series LED is still one of the top performance product on the global markets. Achieving typical Ra 97 and minimum Ra 95, the stability and consistent quality in mass production are verified by statistical identification.
Enhanced CRI R9 technology
The most crucial index of R9 is missed in Ra calculation.
It is obvious to see from 600nm, which is just the start of red color in the visible spectrum, the TCS-9 spectral reflectance raises sharply, in consequence, if the light source does not have sufficient spectral power distribution in 600nm-800nm, it will be difficult to get a high R9. The capability of rendering the red color cannot be promised if the red spectrum is missed or not sufficient in the original light.
In the comparison of fluorescent and halogen, apparently, halogen offers the richest 600+nm power, while the discrete fluorescent spectrum has limited energy there. Then in this comparison, halogen R9 = 99 but the fluorescent is R9 = -27.
Comparing a standard LED to Yujileds BC series LED at 3000K, although the emission principle is the same, the results present different R9 significantly where the standard LED is R9 = 13 and Yujileds BC series LED is R9 = 96.
Transcend high CRI
Current problem of high CRI LED on the market
High CRI becomes the tendency for LED products in recent years, and manufacturers start providing “nominal” high CRI LED to the market, however, as the result of a detailed investigation, most manufacturers’ high CRI LED are limited in the range of 2700K-5000K, where lower and higher CCTs are missed when applying to more specific applications.
Yujileds BC series LED extends high CRI performance from 1800K to 20000K CCT
1800K
2200K
2400K
2700K
3000K
3200K
4000K
5000K
5600K
6500K
10000K
20000K
In comparison to a standard LED on the market is generally in the available CCT range of 2700K-6500K, and high CRI LEDs are more limited to fewer options, Yujileds BC series LED can be extended to 1800K-20000K with the unique phosphor solutions, maintaining the CRI still above 92-97 and excellent spectral qualities. Moreover, looking into the specific Ri in each CCT, the color rendition is well balanced without significant difference, even for the extreme CCTs. Therefore, the CRI is always consistent regardless of what CCT we combine with the BC series LEDs.
Consistent Ri even for the extreme CCTs
1800K
2200K
2400K
2700K
3000K
3200K
4000K
5000K
5600K
6500K
10000K
20000K
CRI statistic support - introducing the plot box statistics
In actual applications, LED can work individually or as a group on a printed circuit board, therefore the consistent CRI is critical for both. Generally, a manufacturer only provides a typical datasheet or report to infer the overall performance but the risk is that if some LEDs in a batch have worse CRI but the typical report cannot match, especially when the application uses fewer LEDs which means CRI is difficult to be averaged with those higher ones, then the risk falls to the customers’ lighting fixture.
Understanding the statistical features of LED and processing relevant analysis and control are important in this case, and these are what we do for our BC series LED. We provide the full statistic and data support from the production of 1,000,000pcs of each CCT from 1800K to 20000K, and present all characteristics and guidance for customers to make reliable simulation and prediction accordingly. And from the statistical data, we can also read that the BC series LED perform excellently on the CRI consistency.
Introduce the product line
2835 LED
The BC series 2835L LED is one of the most economical solutions of low-power of 0.2W with full CCT options.
The BC series 2835M LED is rated at 0.5W and is designed for imporving the luminous efficacy on the flexible strip.
Surface Mount Device (SMD) |  2835L | 2835M |
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| Package size | 2.8mm * 3.5mm | 2.8mm * 3.5mm | |||||
| Rated current | 60mA | 150mA | |||||
| Forward voltage | 2.8V – 3.2V (0.1V interval binning) | 3.0V – 3.4V (0.1V interval binning) | |||||
| Luminous flux | 13lm – 22lm | 45lm – 58lm | |||||
| CRI / R9 | 97 / 90 | 97 / 90 | |||||
| Rf / Rg | 92 / 100 | 92 / 100 | |||||
| Chromaticity bin | SimpleBinning | SimpleBinning | |||||
| Spectral power distribution (normalized CSV) | 1800K | 2200K | 2400K | 2700K | 3000K | 3200K | |
| 4000K | 5000K | 5600K | 6500K | 10000K | 20000K | ||
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3030 LED
The BC series 3030 LED is the mid-power version rated at 1.0W.
The BC series 3030-G04 LED is rated at 1.0W but is enhanced the luminous efficacy up to 140lm/W, maintanning the CRI up to 97.
Surface Mount Device (SMD) |  3030 | 3030-G04 |
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| Package size | 3.0mm * 3.0mm | 3.0mm * 3.0mm | ||||
| Rated current | 300mA | 300mA | ||||
| Forward voltage | 3.0V – 3.4V (0.1V interval binning) | 2.8V – 3.2V (0.1V interval binning) | ||||
| Luminous flux | 73lm – 102lm | 85lm – 115lm | ||||
| CRI / R9 | 97 / 90 | 97 / 90 | ||||
| Rf / Rg | 92 / 100 | 92 / 100 | ||||
| Chromaticity bin | SimpleBinning | SimpleBinning | ||||
| Spectral power distribution (normalized CSV) | 2700K | 3200K | 4000K | 5000K | 5600K | 6500K |
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5555 LED with 60° optical lens
The 5555 series LED is the combination of a typical SMD (Surface Mounted Device) LED with a silicon lens. With Yuji phosphor technology inside, all 5555 series LEDs are defined as CRI 97 performance.
With the PCT lead frame, optimized LED phosphor solution and silicon lens, the 5555 series is robust for long-time working. After 5000 hours continues work with the rated power, no decay can be observed, and the 5555 series LED offers not only promising maintenance of brightness, but also the consistent color which is required critically in many different applications.
The 60° lens offers a significant effect for focused light with increased illuminance compared to a standard 120° SMD LED, and the high color rendition feature with accurate color consistency makes the 5555 series LED an ideal solution for photographic and cinematography lighting for creating the “hard light”.
The 5555MX LED is rated at 0.5W and 5555HX is rated at 1.0W.
Surface Mount Device (SMD) |  5555MX | 5555HX |
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| Package size | 5.5mm * 5.5mm | 5.5mm * 5.5mm | ||
| Rated current | 150mA | 300mA | ||
| Forward voltage | 3.0V – 3.4V (0.1V interval binning) | 3.0V – 3.4V (0.1V interval binning) | ||
| Luminous flux | 45lm – 55lm | 85lm – 115lm | ||
| CRI / R9 | 97 / 90 | 97 / 90 | ||
| Rf / Rg | 92 / 100 | 92 / 100 | ||
| Chromaticity bin | SimpleBinning | SimpleBinning | ||
| Spectral power distribution (normalized CSV) | 2700K | 3200K | 4000K | 6500K |
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3032 2-in-1 LED
Tunable white, or saying bi-color LED, is not a novel concept on the market. For human-centric lighting or cinematography lighting which requires a tunable spectrum, bi-color LED is already widely applied in many products. So far, most tunable white LEDs on the market are separated single-white color, however, considering some special projects which desire not only bi-color effect but also limited space of illumination, or high illuminating density, the new 3032 series will be a preferable option. The 3032 LED is rated at 0.5W for each color and the standard version is the combination of 3200K + 5600K, and 2700K + 6500K, both are high CRI, and it offers typical 55lm (5600K) with typical 120lm/W efficacy.
Compared with the designs of a PCB with standard bi-color LEDs and the 3032 LED, when assembling the LEDs as a high-density matrix, there will be a significant difference. Simulateing a specific case of 1 ft × 1ft panel, the solution with 3032 LED achieves higher than density than separated bi-color LEDs. Apparently, the 3032 LED can not only achieve twice the power within the same limitation of size but provide easier electrical design.
The 3032 LED offers easier diffusion capability as well because of the feature of closing to a spot source. Compare to the standard separated bi-color LED when applied in a panel type or linear lighting fixture, the 3032 LED solution helps with the design for thinner or narrower side-emitting lights because of its compact structure, the standard separated bi-color LED when applied in a lighting fixture.
Surface Mount Device (SMD) |  3032 |
| Package size | 3.0mm * 3.2mm |
| Rated current | 150mA (individual color) |
| Forward voltage | 2.8V – 3.4V (0.1V interval binning) |
| Luminous flux | 40lm - 57lm |
| CRI / R9 | 97 / 90 |
| Rf / Rg | 92 / 100 |
| Chromaticity bin | SimpleBinning |
| Spectral power distribution (normalized CSV) | 2700K - 6500K / 3200K - 5600K |
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