UV Lighting and
Fluorescent Effects in String Art
UV String Art and Blacklight Art
UV string art is a form of geometric wall art created with fluorescent threads that glow under ultraviolet light. Under blacklight illumination, the colors become highly vibrant and create psychedelic visual patterns often used in festival decorations and modern interior design.
Fluorescent filaments used in string art react to different types of light. The strongest visual effect is achieved when illuminated with ultraviolet or blue light, which activates fluorescent pigments in the materials and creates the characteristic glow effect.
When creating my Psybell artworks, I experiment with several types of lighting that differ in wavelength, measured in nanometers (nm). Each wavelength produces a slightly different visual result and influences how individual colors interact with each other.
Understanding these light properties helps achieve the final psychedelic visual harmony that makes UV string art so unique.
Most Commonly Used Wavelengths
395–400 nm – Classic UV “Blacklight”
Example: 
This is the most common type of UV lighting, widely known from:
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psytrance festivals
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clubs and parties
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art installations
At this wavelength:
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fluorescent filaments glow strongly
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the artwork gains a distinct psychedelic glow effect
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the background and structure of the piece remain visible
This type of UV light creates the classic blacklight atmosphere familiar from psychedelic environments.
With powerful light sources in this range, a slight tanning of the skin may occur if a person is exposed to UV radiation for extended periods. For this reason, UV lighting should always be used responsibly and excessive skin exposure should be avoided.
In horticulture, a similar UV spectrum is sometimes used to stimulate the production of secondary plant metabolites, which are associated with protective compounds and pigment formation in plants.
365 nm – Deep UV
Example: 
The wavelength 365 nm belongs to the deeper UV spectrum and is commonly used in:
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curing UV adhesives
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banknote verification
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forensic analysis
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professional fluorescence applications
In string art it produces a very strong visual effect:
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fluorescent colors glow extremely intensely
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contrast becomes very high
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the background often appears almost completely black
This type of lighting can produce an exceptionally strong glow effect.
Because this UV light is very intense, it is not recommended to look directly into the light source, as prolonged exposure can potentially damage the eyes.
385 nm – Balance Between Glow and Natural Look
The wavelength 385 nm sits between deep UV (365 nm) and classic blacklight (395 nm).
Its characteristics include:
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strong fluorescence
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more natural-looking colors
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a good balance between brightness and contrast
For artistic applications, this wavelength provides a very interesting compromise between intensity and color visibility.
395-405 nm – Violet Light
Example: 
The wavelength 395-405 nm lies on the boundary between ultraviolet and visible light.
Its visual effect includes:
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a softer glow effect
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more visible violet tones
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gentle illumination of the surrounding space
This spectrum is often used in decorative LED lighting installations.
440 nm – Blue Light
The wavelength 440 nm belongs to the visible blue light spectrum.
When used with fluorescent filaments it produces:
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a subtle luminescent effect
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colors shifting toward blue or whitish tones
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a less psychedelic but still aesthetically pleasing result
Blue light in this range is also widely used in plant cultivation during the vegetative growth phase, where it promotes:
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stronger stems
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larger leaves
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compact plant growth
How I Work With Light During the Creation Process
During the weaving process itself, I usually work under normal lighting conditions. This allows me to precisely observe:
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symmetry of the pattern
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tension of the filaments
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geometric precision of the structure
However, when I need to evaluate how the colors will behave under UV light, I briefly switch on a UV lamp.
At that moment I can immediately see:
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how individual fluorescent colors interact
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whether they create a harmonious glow effect
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or whether a different color combination is needed
If the colors do not work together as intended, I simply unravel part of the thread and replace it with a more suitable shade, sometimes even from a different filament manufacturer.
This process allows the final piece to reach a state where all colors glow together in perfect visual harmony.
Bonus Included With Orders
At the moment, I include a UV LED reflector for free with every order (while supplies last).
Reflector Specifications
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Power: 50 W
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Wavelength: 390 nm
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Dimensions: approximately 10 × 20 cm
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Aluminum housing for effective cooling
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Power supply: 220 V
