Professional disinfection through controlled exposure to ultraviolet light (UV-C)
Proof of effectiveness and scientific validation
A disinfection level of 99.99%* for surface disinfection inside Li.LAC has been approved by the independent, accredited laboratory Opsytec Dr. Gröbel GmbH.
The departments Biomedical Engineering and Medical Microbiology & Infection Prevention of the University Medical Center Groningen (UMCG) have conducted comprehensive scientific studies to evaluate the effectiveness of Li.LAC. Viruses were sprayed onto microphones, similar to singing into the mic. The results show a reduction of 99.3% of the viral load on strongly contaminated microphones (including the metal grille and foam underneath) after 10 minutes irradiation inside Li.LAC.
* The exact disinfection level varies with the type of virus or bacteria and with the shape and the surface of the object to be disinfected.
** Industry standard vocal microphones were used for this study.
Microphone and material compatibility
Any kind of intense cleaning procedure (soap & water, alcohol or UVC light) has a long-term effect on the materials used in or on microphones. Different kinds of plastics and the outer appearance (color/ gloss) especially, can be altered or degraded by “too much cleaning”. We have run numerous tests with various microphones inside Li.LAC to evaluate the long-time impact of UV-C light. The results show that the aging effect implied by UV-C disinfection inside Li.LAC is negligible compared to the normal aging that happens to the microphones (by mechanical impacts, dirt, humidity etc.).
During the long-term irradiation tests in Li.LAC, we recorded changes in the appearance and frequency response of the microphones after 500, 1000 and 1500 disinfection cycles. 1500 cycles correspond to several years in the real life of a microphone.
room temperature (0°C bis 45°C)
110V-240V~ or 220V-240V~, +/-10% 50-60Hz, 40W
2x 16W, 254nm wavelength
UV-C irradiance @ microphone head:
UV-C irradiance @ microphone shaft:
**Li.LAC is not yet approved for sales to Hawaii