Light that disinfects — no UV, no chemicals
EVLN is a patented photocatalytic technology that activates the TiO₂ coating on the lamp body using visible spectrum 450–600 nm. The generated ROS inactivate microorganisms on surfaces and in the air — continuously, safely, without any maintenance.
UV-C315 nm
UV-A380 nm
violet450 nm
blue550 nm
green650 nm
red780 nm
IR
Photocatalysis with Visible Light
EVLN (Enhanced Visible Light Node) is a technology in which specific ranges of visible LED spectrum (450–600 nm) activate the TiO₂ photocatalyst deposited on the lamp body coating. As a result of the photocatalytic reaction on the coating surface, reactive oxygen species (ROS) are generated, which inactivate microorganisms — bacteria, fungi and viruses.
Key advantage: the entire process occurs on the lamp surface and in its immediate surroundings, not inside living organisms. ROS are short-lived and local — safe for people, animals and materials. No UV is required, no chemicals are used, and rooms do not need to be vacated.
Effectiveness confirmed by independent laboratory studies: TÜV SÜD Witness Test (99.71% reduction of S. aureus), IBPRS K/508/01/2024 (92.48% reduction of microorganisms, 85.57% of mould and yeast), as well as SIRIM Malaysia, PZH and UGENE Singapore certifications.
How EVLN Inactivates Microorganisms
Four stages of photocatalytic reaction during normal lighting operation.
Why TiO₂ Photocatalysis Works
Titanium dioxide (TiO₂) is one of the most studied photocatalysts. Pure TiO₂, however, requires ultraviolet light (band gap ~3.2 eV). In the EVLN technology the coating is doped with metals (Cu, Ag) and non-metals (N), narrowing the band gap so the photocatalyst can be activated by visible light in the 450–600 nm range. A photon excites an electron from the valence band to the conduction band, leaving a hole in the VB — an e⁻/h⁺ pair is formed. The holes oxidise water to •OH radicals; the electrons reduce oxygen to O₂•⁻ (superoxide), which can also dismutate to H₂O₂. These reactive oxygen species (ROS) attack the universal biological structures of microorganisms: they oxidise membrane lipids, denature proteins and damage DNA.
A critical property of ROS is their short lifetime (•OH ~microseconds, O₂•⁻ slightly longer) and an action range limited to a few hundred nanometres from the catalyst surface. This is what guarantees the safety of the technology in the presence of people: ROS do not spread through the air over large distances, but degrade microorganisms that come into contact with the coating or are adsorbed from passing air. People in the room do not come into contact with the active radicals — they act only in a thin layer just above the fixture surface.
An important consequence of this mechanism is its effectiveness against antibiotic-resistant strains. Antibiotic resistance is mediated by specific protein modifications (e.g. PBP2a in MRSA, β-lactamases, efflux pumps) — these defences do not protect the cell against an attack by ROS, which target universal lipid membranes and DNA. The effectiveness of photocatalytic surfaces against MRSA, VRE and ESBL E. coli is documented in the photocatalysis literature (Mitoraj et al. 2007, Foster et al. 2011). Dedicated tests on resistant strains for EVSUN are planned in the next certification stage; the certified TÜV SÜD and UGENE results currently apply to wild-type strains (S. aureus ATCC 6538, E. coli).
Confirmed Results
All numbers below come from certified reports — no advertising, no rounding.
EVLN vs Other Disinfection Methods
| EVLN (EVSUN) | Conventional LED | UV-C | Ozonation | HEPA | |
|---|---|---|---|---|---|
| Human safety | Yes | Yes | No | No | Yes |
| Effectiveness vs microorg. | Yes | No | Yes | Yes | ~ Partial |
| Continuous 24/7 | Yes | Yes | No | No | Yes |
| Low TCO | Yes | Yes | No | ~ Partial | ~ Partial |
Why EVLN instead of UV lamps?
UV-C lamps are effective but require room evacuation and are hazardous to people. EVLN operates continuously in the presence of people.
UV-C Lamps (traditional)
EVSUN EVLN Technology
Important: EVSUN EVLN is a complement — it does not replace standard disinfection procedures required in medical facilities.
Where EVLN technology excels
Hospitals, clinics, surgeries
Patient rooms, procedure rooms, corridors, isolation wards. HAI reduction support. CE + PZH documentation required.
Restaurants, hotels, kitchens
Production kitchens, buffets, service lines. IP65, HACCP compatible.
Open space, classrooms, halls
Reduction of seasonal infections in office and school spaces. Non-flicker and Blue Care for working comfort.
Patents protecting EVLN technology
Method for reducing microorganisms using visible light spectrum
Core EVLN patent — use of 450–600 nm range to activate photosensitisers.
Multi-function luminaire with integrated disinfection module
Design integrating standard LED with EVLN module in a single luminaire.
Blue Care — spectral blue emission reduction for visual comfort
Blue Care technology reducing eye strain during prolonged work.
EVLN exposure management system for IoT luminaire networks
EVLN zone management, monitoring and reduction reporting — SmartEVLN module.
Independent Documentation
Reports available for download in PDF format.
99.71% reduction of Staphylococcus aureus after 6h exposure under laboratory conditions.
Download PDF reportConfirmation of hygienic safety of materials and TiO₂ coating by the National Institute of Hygiene.
Download certificate PDF92.48% microorganism reduction, 85.57% mould and yeast reduction — certified study by a Polish laboratory.
Download PDF reportIndependent UGENE laboratory studies confirming the effectiveness of EVLN technology.
Download PDF reportsEVLN technology certification by the Malaysian standardisation institute SIRIM.
Download certificate PDFFrequently Asked Questions
Does EVLN emit UV?
No. EVSUN lamps operate exclusively in the visible spectrum range (450–600 nm). UV (200–380 nm) is not emitted — confirmed by TÜV SÜD measurements. The absence of UV is a fundamental difference from UV-C lamps.
Are ROS safe for people?
Yes. ROS generated by TiO₂ are short-lived (microseconds) and act locally on the surface of the lamp coating. They do not reach people or animals in the room. The technology has been repeatedly confirmed as safe by independent laboratories.
What is the disinfection range?
The effective microorganism inactivation range is ~3 m for standard lamps and ~6 m for high-beam versions. With correct installation (matching lamps to room area), it provides continuous microbiological protection.
How does EVLN differ from UV-C?
UV-C (200–280 nm) is dangerous for people, requires room evacuation and works intermittently. EVLN uses the visible spectrum 450–600 nm, works 24/7 with people present, does not damage materials and requires no health & safety procedures.
Does EVLN light affect sleep?
Not negatively. The 450–600 nm range is the yellow-green part of the spectrum — it is not the aggressive blue peak (<450 nm) responsible for suppressing melatonin. Optionally, EVSUN lamps are available with the Blue Care module that reduces evening emission.
What are the energy savings compared to other disinfection methods?
EVLN integrates disinfection with general lighting — there are no additional devices or operating costs. Compared to UV-C (separate installation, servicing, interlocks) the TCO is significantly lower. EVSUN lamps achieve efficiency >130 lm/W.
Browse EVLN Lamps for Your Facility
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