Advantages of UVC LED Compared to Traditional Low Pressure Lamps (LPL)
| Function | UVC LED | Lavtrykslampe (LPL) |
| On/Off cycle | Unlimited | Up to 3,500 cycles |
| Start-up | Instant | Requires warm-up |
| Stability | Stable after a few seconds | Up to 5-10 min. and fluctuating output |
| Heat generation | Heat is directed backwards | Infrared heat in all directions |
| Light direction | Controllable (30–120°) | Diffuse, requires reflectors |
| Physical size | Compact and modular | Depending on power and pipe size |
UVC LEDs thus offer a number of design and functional advantages that make them particularly suitable for integration into modern systems where precision, compactness and controllability are essential.
Efficiency and development potential
Although UVC LEDs are still in an early stage of development, their potential is significant. Efficiency is typically measured via Wall Plug Efficiency (WPE):
WPE = Optical Output Power / Electric Power Input
- White LED: Up to 90% WPE (after 25 years of development)
- UVC LED (275–285 nm): Ca. 10–15 % WPE
- UVC LED (230–235 nm): Kun 2–3 % WPE
Efficiency decreases significantly at lower wavelengths, which is a technical challenge – but also an opportunity for innovation. In comparison, traditional UVC lamps have a WPE of 25–40%, depending on the type and operating conditions.
UVC LED as a disinfection device
WPE is directly related to how effective a UVC LED is as a source of disinfection. The higher the optical output, the greater the ability to inactivate microorganisms. At the same time, wavelength plays a crucial role, as different pathogens react differently to specific UV levels (more on this in a separate article).
Thermal management – a critical factor
UVC LEDs generate heat that must be managed efficiently to avoid overheating and degradation of components. This places demands on both PCB design and heatsink integration. Heat is typically conducted backwards from the LED, which allows for targeted thermal management – but requires precise material selection and layout.
Why choose UVC LED – despite low efficiency?
Although UVC LEDs do not yet match traditional light sources in efficiency, they offer:
- Modular integration into compact systems
- Precise light control and tilting
- Long service life and robustness with proper thermal management
- Instant activation without heating
- Environmentally friendly operation without mercury or glass tubes
The technology is rapidly evolving, and the next few years will bring significant improvements in both output and energy efficiency.
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