CULE-20QS-XEG-Blue 470nm

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 Blue LEDs (475 nm)

Wavelength Range

Blue LEDs emit light at 475 nm, located in the middle of the blue region of the visible spectrum. This makes them versatile for applications requiring moderate blue light intensity and energy.

Colour Perception

The human eye perceives 475 nm blue light as a vivid blue, which is more prominent than shorter wavelengths like Royal Blue (440-460 nm). This wavelength offers a balance of brightness and visual impact.

Spectral Output

Blue LEDs have a narrow spectral output centred around 475 nm. This precise emission makes them effective in applications like:

•General illumination

•Decorative lighting

•Enhancing visual contrast in displays

Energy Efficiency

Blue LEDs are energy-efficient in their wavelength range and are commonly used in applications where brightness and energy conservation are critical. Their wavelength allows for good visibility while maintaining efficiency.

Applications in Photosynthesis

Blue LEDs at 475 nm play a role in photosynthesis stimulation, especially in plant growth systems. They support leaf and vegetative development, complementing red LEDs for a balanced horticultural lighting setup.

Fluorescence Excitation

Blue LEDs are widely used in fluorescence microscopy and related applications. Their 475 nm wavelength excites a broad range of fluorophores, enabling vibrant fluorescence for scientific and analytical purposes.

Colour Rendering

Although Blue LEDs have a narrow spectral range, they contribute significantly to multi-colour systems, such as RGB configurations. This wavelength enhances the overall balance of light output in mixed-colour setups.

Thermal Management

Due to their high brightness and energy output, effective cooling solutions are essential to prevent thermal degradation and ensure long-term reliability.

Visual Aesthetics

The crisp and striking appearance of 475 nm blue light makes it ideal for:

•Architectural lighting: Enhancing modern design aesthetics

•Entertainment and stage lighting: Creating vibrant, eye-catching visuals

•Aquarium lighting: Supporting marine environments with naturalistic blue tones

Specialised Uses

•Aquarium Lighting: Supports aquatic life and enhances the appearance of marine tanks.

•Scientific Research: Effective for stimulating photoreceptors in various studies.

•Signage and Displays: Provides vibrant illumination for high-contrast visual effects.

Drive Current and Efficiency

•Optimised Drive Currents: Proper drive currents are crucial for balancing spectral output, efficiency, and longevity.

•Power Intensity: At higher currents, 475 nm LEDs deliver higher brightness with a minor trade-off in efficiency.

Thermal and Optical Components

•Heat Management: Adequate cooling mechanisms, such as heat sinks, maintain stable light output and prolong LED lifespan.

•Light Distribution: Using optical components like lenses or reflectors ensures uniform and effective illumination.

Summary

A light engine composed of 475 nm Blue LEDs provides consistent, vibrant output in the mid-blue spectrum. This configuration is well-suited for:

•Horticulture

•Architectural and ambient lighting

•Signage and displays

•Aquarium and marine lighting

The unique properties of Blue LEDs at 475 nm make them a versatile choice for applications demanding visual impact, energy efficiency, and precise spectral output. Their adaptability enhances their value across multiple industries.

Application Examples