Choosing the Correct UVC Wavelength
Selecting a UVC LED wavelength is not simply about maximum power output. Different wavelengths interact differently with microorganisms and materials.
254nm – Traditional Germicidal Standard
Historically used in mercury lamps, 254nm provides deep DNA absorption but lacks precision control and requires bulky fixtures.
275nm – Popular Commercial Option
275nm LEDs offer efficiency and are widely used in consumer devices. However, deeper penetration can sometimes affect surrounding materials.
230nm – Controlled Surface Sterilization
230nm provides:
• Shorter penetration depth
• Strong protein absorption
• Better localized sterilization
• Reduced material degradation
Therefore, engineers often use it in enclosed sterilization chambers and precision water treatment paths.
Practical Engineering Selection
System designers balance:
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Optical dose
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Target microorganisms
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Material compatibility
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Thermal management
A reference component suitable for precision integration:
https://www.u-vcare.com/products/uvc-led-230nm-120%C2%B0-60%C2%B0-48-48mil
No single wavelength fits all applications — but 230nm is increasingly preferred in compact sterilization modules requiring controlled exposure.