Frez Flex - LED strip for routing
How to create a LED neon effect without a profile or diffuser?
The effect of a uniform line of light can be achieved not only with a classic LED strip in a profile. Frez Flex is a flexible LED system for installation in a precisely milled groove, enabling the creation of lettering, outlines, logos and decorative lines of light in furniture, advertising and commercial interiors.
In this article we explain how Frez Flex differs from a standard LED strip, where it performs best, how to plan the installation and what to remember before starting the project.
Data
11 May 2026
You will read in
7 Minutes
Subject
Flex cutter
What is Frez Flex?
Frez Flex is a flexible LED lighting system designed for installation in a properly machined groove. It has been developed for projects in which light serves not only a functional purpose, but also becomes a visible decorative element.
The product makes it possible to create light lines, lettering, logos, outlines and custom shapes in furniture, cabinetry, advertising lightboxes, walls and display elements.
The system consists of three basic components:
Frez Flex LED strips,
a silicone diffuser for Frez Flex,
a properly prepared mounting groove.
Once installed in the substrate, the silicone cover creates a soft, even line of light and reduces the visibility of individual LED points. In practice, this delivers an effect similar to LED neon, but in a form adapted for installation in panels, furniture, advertising elements and decorative applications.
Why isn’t Frez Flex an ordinary LED strip?
The key difference lies in the way the light is presented.
A classic LED strip is a technical product. To achieve an aesthetic linear effect, it most often requires an aluminium profile, a diffusing cover and a suitably planned mounting location.
Frez Flex has been designed as a ready-made system for creating a visible, decorative line of light. The user does not build the effect from several separate components, but uses a solution that, once installed in the appropriate groove, creates a coherent and even line of light.
This is particularly important where lighting is part of the design: as lettering, an outline, a logo, a decoration, a sign or a finishing detail.
When is it worth using Frez Flex?
Frez Flex works best where decorative effect, aesthetics and the ability to run light along a defined shape are important.
This solution is worth considering primarily in projects where light is meant to be a visible element of the composition, rather than merely a technical source of lighting.
Advertising, signage and branding elements
Frez Flex can be used to create illuminated lettering, logos, letter outlines and decorative signage. It is a good solution for advertising agencies, lightbox manufacturers and visual identity specialists.
Example applications:
wall logo,
signs such as OPEN, BAR, RECEPTION,
letter outlines,
light elements in lightboxes,
decorative signs at points of sale,
illuminated visual identity elements.
In this type of project, Frez Flex allows you to achieve a LED neon effect without a traditional neon tube and without the need to use aluminium profiles.
Furniture and joinery fit-outs
The second natural application area is furniture and bespoke joinery. Frez Flex can be mounted in the panel as a decorative lighting element, for example in kitchen, bathroom, retail, trade fair or display joinery.
However, one important rule should be remembered: Frez Flex is a visible element. Once recessed into the panel, it should not be treated as a flaw or compromise, but as an intentional decorative detail.
This is a solution for projects where the light line is to be part of the furniture's aesthetic.
Example applications:
light groove in a furniture panel,
decorative lines in joinery,
lighting elements in display units,
custom trade fair furniture,
markings and details in premium furniture,
decorative backlighting in commercial joinery.
Commercial interiors and architectural projects
Frez Flex is also ideal for spaces where light is meant to create atmosphere, draw attention and emphasise the interior's individual character.
It can be used as a decorative line of light in service premises, restaurants, showrooms, gaming zones, event spaces or points of sale.
This is a solution for projects where visual impact, customisation and the ability to route light along a non-standard shape are important.
Frez Flex vs a classic LED strip – the key differences
Frez Flex is not a direct replacement for a classic LED strip in every project. It is a system designed primarily to achieve a decorative, continuous line of light.
A classic LED strip will be a good choice when the main priority is functional lighting, a high light output or installation in a technical profile.
Frez Flex is worth choosing when the main goal is an aesthetic, continuous line of light and an LED neon effect.
The key advantages of Frez Flex compared with a classic LED strip are:
a more uniform light effect,
limited visibility of individual LED points,
no need to select a separate profile and diffuser,
simpler installation of the complete system,
the ability to route light along curves and shapes,
an aesthetic appearance in decorative applications,
greater design freedom for lettering, outlines and patterns.
However, it is important to remember that Frez Flex is a decorative product. It should not be assessed solely on the basis of the number of lumens. Its main value is the visual effect, not maximum light output.
How do I choose the colour of the LED strip and silicone diffuser?
In the Frez Flex system, an LED strip can be combined with a suitably selected silicone diffuser. In practice, there are two most common configuration options.
The first option is to use a white or opal diffuser with an LED strip in the chosen colour. This is a good solution when, with the lights off, we want a neutral, bright appearance of the line.
The second option is to pair a coloured diffuser with an LED strip in a similar colour. In this case, the decorative colour remains visible even when the lighting is switched off.
The choice of option should depend on whether Frez Flex is meant primarily to be a source of a lighting effect, or also a visible decorative element when the power is off.
In advertising and branding projects, it is often worth keeping the colour visible even when the light is off. In furniture, built-ins and premium interiors, a neutral line may be the better choice, creating a subtle light effect when switched on.
Which accessories should be considered?
Before starting the installation, it is worth preparing not only the tape and silicone diffuser, but also accessories that make cutting, milling and installation easier.
Depending on the nature of the installation, the following may be required:
straight knife for Frez Flex,
round knife for Frez Flex,
8 mm milling cutter for Frez Flex,
mounting components and tools for substrate preparation.
Dedicated knives make it easier to professionally adapt the system to the required curvature. This is particularly important for lettering, arches, contours and projects where the final result must be very precise.
Frez Flex is designed to operate at 12 V DC, so the appropriate LED power supply should be selected at the planning stage, and its location should be taken into account. It is also worth allowing for later service access, especially in the case of furniture builds, advertising light boxes and permanently installed systems.
Step-by-step installation instructions for Frez Flex
Correct installation of Frez Flex consists of several stages: preparing the groove, bonding the LED strip, connecting the power supply, fitting the silicone diffuser and checking the final result. Each of these steps affects the uniformity of the light line and the durability of the installation.
1. Make the mounting groove
The first stage is to make the groove according to the system dimensions. The groove should allow the LED strip and silicone diffuser to be fitted securely.
After milling, carefully clean the groove of dust, chips and dirt. A clean surface improves the strip's adhesion and makes it easier to fit the entire system correctly.
2. Bond the LED strip into the groove
Next, bond the 12 V LED strip into the prepared groove. The strip should be laid evenly along the full length of the light line, without tension or accidental kinks.
At this stage, it is worth making sure that the strip has been cut at the correct point and that the cables can be routed according to the earlier design.
3. Connect the power wires
The next step is to solder the wires to the LED strip and connect it to a 12 V DC power supply. Before continuing the installation, check the polarity, the quality of the connections and whether the strip works correctly.
This is an important moment, because once the silicone diffuser has been fitted, access to the LED strip and the connections may be limited.
4. Fit the silicone diffuser
After checking that the LED strip works, press the Frez Flex silicone diffuser into the prepared groove. The diffuser should fit securely in the groove and cover the strip evenly along the full length of the installation.
It is the silicone diffuser that provides light diffusion and creates a soft, uniform line without clearly visible LED points.
5. Check the final result
After completing the installation, switch it on and check whether the light line is even along the full length. It is worth checking that the diffuser is seated evenly, the strip lights properly, and the cables and ends have been adequately secured.
Frequently Asked Questions about Frez Flex
Can Frez Flex be cut?
Yes, the Frez Flex strip can be cut along the designated cutting section. Before installation, it is worth checking the exact information in the product datasheet.
Can Frez Flex be bent in both directions?
Frez Flex is a flexible product, but the bend radius and bending direction should be planned in line with the technical parameters of the given variant. For projects with arches, lettering and contours, it is worth preparing the full route of the light line in advance.
Does Frez Flex replace a standard LED strip?
Not in every application. Frez Flex works best as a decorative line of light, lettering, contour or neon effect. For main technical lighting, a classic LED strip in a profile may be a better choice.
What voltage does Frez Flex have?
Frez Flex operates on 12 V DC, therefore it requires a suitable LED power supply.
Is Frez Flex suitable as the main lighting for a room?
Frez Flex is best treated as a decorative product. Its purpose is to create an impressive, uniform line of light, rather than replace the main lighting source in a room.
Summary
Frez Flex is a flexible LED system for creating uniform light lines, lettering, outlines and decorative details. It combines an LED strip with a silicone cover, making it possible to achieve an LED neon effect without the need for a traditional profile and diffuser.
The biggest advantage of this solution is design freedom. Frez Flex allows you to create curves, lettering, logos and custom patterns that can become a visible element of furniture, advertising or an interior.
It is a good choice for projects where light is not only meant to illuminate, but also to shape the character of the space, highlight visual identity, or create a decorative detail.
If you are looking for a product for an impressive, uniform line of light, Frez Flex is a solution worth considering already at the design stage.
Author
Tomasz Jałocha
Brand Manager
Responsible for the development and consistency of the brand image. On a daily basis, ensures that Bergmen's values are visible in every aspect of communication - from marketing strategy, through expert materials, to customer experiences.
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