CULE-20QS-XEG-RB

Application

• Non-Directional
• Directional
• Downlights
• Exterior Area
• Landscape
• Architectural
• Entertainment
• Horticulture
• Vehicle

Data Sheets

• XLamp Element G Feature Sheet
• XLamp Element G Data Sheet
• Optimising 4 Channel Led Design with XEG

Note  Cree LED maintains a tolerance of ±7% on flux and power measurements, ±0.005 on chromaticity (CCx, CCy) measurements and a tolerance of ±2 on CRI measurements. See the Measurements section (page 97).

• XLamp XE-G LED order codes specify only a minimum flux bin and not a maximum. Cree LED may ship reels in flux bins higher than the minimum specified by the order code without advance notice. Shipments will always adhere to the chromaticity or DWL bin restrictions specified by the order code.

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Spectral Observations of Royal Blue LEDs

• Wavelength Range:
  Royal Blue LEDs typically emit light in the 440-460 nm range, falling within the deep blue-violet portion of the visible spectrum. This makes them particularly useful for applications that require light in this specific spectral region.
• Colour Perception:
  The human eye perceives Royal Blue light as a strong, vibrant blue. However, it appears somewhat dimmer compared to other colours like green or yellow due to the eye’s lower sensitivity to shorter wavelengths.
• Spectral Output:
  Royal Blue LEDs have a narrow spectral output concentrated around the 440-460 nm range, which creates a highly focused and intense blue light. This narrow output makes them ideal for specialised applications, such as stimulating certain photochemical reactions or for creating specific visual effects.
• Energy Efficiency:
  Despite appearing dimmer to the human eye, Royal Blue LEDs are highly energy-efficient within their wavelength range, making them valuable for applications like plant growth lighting (photosynthesis) or aquarium lighting, where this specific wavelength is critical.
• Application in Photosynthesis:
  Royal Blue LEDs are widely used in horticulture due to their ability to promote the growth of plants by stimulating the photosynthesis process. They are effective in encouraging leaf and vegetative growth, particularly in combination with other wavelengths.
• Fluorescence Excitation:
  These LEDs are often used in fluorescence microscopy and other scientific applications where they can excite fluorescent materials. The deep blue wavelengths are ideal for energising certain fluorophores, causing them to emit light at different, typically longer, wavelengths.
• Colour Rendering:
  On their own, Royal Blue LEDs have limited colour rendering capability because they do not cover enough of the visible spectrum. However, they are essential in multi-colour systems (such as RGB setups) to produce a wide range of colours.
• Cooling Requirements:
  Due to their high intensity and power output, Royal Blue LEDs often require adequate cooling to maintain performance and prevent overheating. Thermal management is critical for ensuring their longevity and stability in various applications.
• Visual Aesthetics:
  Royal Blue light has a sharp, high-energy appearance, which can create striking visual effects in environments such as architectural lighting, entertainment venues, or underwater lighting, where a dramatic blue hue is desired.
• Specialised Uses:
  Royal Blue LEDs are extensively used in aquarium lighting for coral growth and in disinfection systems because the light can penetrate water deeply and stimulate biological processes. They are also used in curing certain materials, such as resins, in industrial applications.

Drive Current and Efficiency:

• Optimised Performance: The spectral output and intensity will depend on the drive current applied to each LED. Proper management of drive currents ensures optimal performance and longevity of the LEDs.

Thermal Management:

• Heat Dissipation: Efficient thermal management is essential to maintain the performance and lifespan of the LEDs, preventing overheating and ensuring stable light output.

Optical Components:

• Light Distribution: The use of optical components such as lenses or diffusers can help control the light distribution, ensuring uniform coverage and enhancing the overall effectiveness of the light engine.

Summary

Utilising a light engine composed of four Royal Blue LEDs provides a balanced and vibrant spectral output primarily in the green-blue to green-yellow regions. This configuration is ideal for applications requiring consistent and bright illumination, such as horticulture, general and ambient lighting, signage, displays, and architectural lighting. The unique spectral properties and flexibility of Royal Blue LEDs make them a versatile choice for enhancing visual appeal and functionality in various settings.

Application Examples