LED Spectrum & Wavelengths

780 nm is a near-infrared wavelength sitting right at the edge of the visible spectrum – essentially invisible to the human eye but easily detected by common silicon sensors. This makes a 780 nm LED an ideal light source for optical sensing systems – it yields strong detector response without producing distracting visible light. By pairing a…

Deep red 660 nm LED emitters have become essential components in both advanced agricultural lighting and biomedical systems. At a wavelength of 660 nanometers – the heart of the red light spectrum – these LEDs align with peak chlorophyll absorption to maximize photosynthetic light for plants, while also offering an optimal balance of optical penetration and…

630 nm red LEDs have emerged as critical components in modern biometric sensors, offering a precise light source for measuring physiological signals beneath the skin. This particular wavelength is ideal for penetrating human tissue to illuminate blood vessels while still being selectively absorbed by key biomolecules like hemoglobin. The result is a balanced interplay of…

520 nm green LEDs are crucial in industrial vision systems and agricultural sensors. In machine vision, this green wavelength aligns with peak camera sensitivity and helps produce balanced white-light illumination for accurate imaging. In agricultural applications, green light is strongly reflected by plant foliage, providing a means for canopy imaging and photosynthesis detection proxies like…

In industrial inspection and machine vision systems, high-power 450nm LED sources have become a key element for providing intense blue illumination. This “royal blue” wavelength sits at the cusp of the visible spectrum between violet and green, offering high-energy photons for enhanced contrast without veering into ultraviolet UV light. These high power LEDs provide intense…

405 nm LED technology sits at the border of visible violet and ultraviolet light (UV-A), effectively functioning as an ultraviolet LED in the UV-A range, making it a unique member of the UV & Near-UV LEDs (235–420 nm) category. This near-ultraviolet wavelength offers distinct advantages for industrial optical systems. From fluorescence microscopy and machine vision…

In the UV curing world, 365 nm is widely recognized as the standard UV-A LED curing wavelength. This specific LED wavelength lies in the long-wave ultraviolet range, delivering “invisible” UV light that triggers photochemical reactions without stray visible glare. From curing inks and coatings to bonding adhesives and hardening 3D printing resins, 365nm UV LEDs…

Wavelength is a defining characteristic of any LED light. It determines the LED’s color (or invisibility in ultraviolet and infrared bands) and influences its efficiency and best applications. By selecting the right LED wavelength – from UV curing at 365 nm to SWIR imaging beyond 1500 nm – engineers can optimize performance for tasks ranging…