25.07.2025 | LED Lighting

Fibre-optic LED lighting – how to turn your ceiling into a starry sky

A starry-sky effect in a stretch ceiling can be made in three ways: with Starsky fibre-light pins fed by an LED strip or LED modules above the membrane (per the product card they need about 5 cm of free space; packs of 250 and 500), with a classic fibre-optic bundle and LED illuminator, or with a printed membrane backlit by modules. The article compares the methods qualitatively, corrects the question of PMMA fibres in saunas and says which membrane gives the best contrast.

A “starry sky” is one of the more frequent client wishes for a stretch ceiling in a bedroom, a child’s room or a spa area. The installer can choose between three techniques that differ in light source, in the space needed above the membrane and in labour. This article describes all three but gives most room to the Starsky fibre-light pins from the 2K-Trade catalogue, because they are the ones that come up most often in questions. We state only the parameters that are on the product card.

Three ways to a starry sky

Starsky fibre-light pins – individual elements of transparent light-conducting material that pass through the membrane; the light comes from an LED strip or LED modules placed above the ceiling.
Fibre-optic bundle with an illuminator – the classic system: one light source in a projector, hundreds of fibres routed above the membrane, only their ends visible.
Membrane with a “starry sky” print – an image of the sky printed on the membrane and backlit from above by LED modules; the light points are print, not separate elements.

The methods can be combined: the print gives the background of nebulae, and pins or fibres give distinct, glowing stars in the foreground.

Method 1: Starsky fibre-light pins

According to the product card, Starsky pins are made of a transparent light-conducting material that disperses LED light; they are compatible with LED strips and LED modules, with white and RGB lighting, and their installation needs only about 5 cm of free space above the ceiling. They work with stretch ceilings, plasterboard and other materials up to 15 mm thick and require no special optical equipment. They are sold in packs of 250 and 500 pieces. That is the complete set of data we have; the number of pins per square metre, the spacing and the strip power are set by the installer for the specific project.

How it works in a stretch ceiling

The principle is simple: above the membrane, in the space between the slab and the ceiling, an LED light source works – an LED strip or LED modules at 24 V. The “star” points are planned on the membrane, the pins pass through it and conduct the light from top to bottom; from the room only the glowing tip is visible. There is no projector and no fibre bundle to route – which is exactly why about 5 cm above the membrane is enough where the classic system needs room for an illuminator.

In installation practice the order is: first lay out and connect the light source above the future ceiling, then stretch the membrane, and finally place the pins according to the plan.

Power and control

Power and control – as per the product card. The strip or modules run at 24 V from an LED power supply matched to the power of the installation, and a controller handles dimming and – with an RGB strip – colour. The power supply and controller are placed where they can be reached after the ceiling is closed, for example in an access hatch or in an adjacent room. The choice of 12 V/24 V power supplies is covered separately in the article How to choose a 12 V/24 V LED power supply.

Method 2: fibre-optic bundle with an LED illuminator

This is the solution the whole starry-sky technique started with. One light source – the illuminator – feeds a bundle of fibres; each fibre is routed above the membrane to its planned point, pulled through a hole and trimmed. From the room only the ends are visible, and they carry neither current nor heat. Today’s illuminators have an LED source with twinkle and colour-change functions; halogen projectors, which still turn up in older kits, are outdated technology – they run hot and need the lamp replaced.

One correction, because many texts – including the previous version of this article – contain an error: the typical decorative optical fibres are polymer (PMMA) fibres, and they are not resistant to high temperature. For saunas and other hot zones glass fibres are used, and that choice is made together with the supplier of the fibre-optic system. The advantage of no current at the ends remains – in a bathroom or by a pool a fibre is safer than any electrical element – but it does not mean temperature resistance.

The cost of this method is above all labour: routing several hundred fibres above the ceiling takes time, and the illuminator needs room and service access. In return the installer has full control over the placement and brightness of every point.

Method 3: printed membrane with module backlighting

Membrane manufacturers offer a “starry sky” print – nebulae, the Milky Way, scattered stars. The printed membrane on its own is a picture; the glow comes from backlighting from above with LED modules that spread the light evenly over the whole surface. 2K-Trade does not sell membranes – the installer orders the print from the membrane manufacturer – but we do supply the LED modules, power supplies and controllers for the backlighting. The method gives no individual sharp points of light; what it gives is a background on which Starsky pins or optical fibres look best.

Comparison of the three methods

The comparison is qualitative – the numbers depend on the project, the membrane and the components chosen.

Feature	Starsky pins	Fibre-optic bundle	Print + LED modules
Light source	LED strip or modules at 24 V above the membrane	LED illuminator, one source for the whole bundle	LED modules above the membrane
Space above the membrane	About 5 cm (per card)	Room for the illuminator and fibre routing	Depends on the modules and the evenness required
Character of the effect	Distinct points, colour per strip (white or RGB)	Points of varying brightness, twinkle and colour change from the illuminator	Diffuse background, no sharp points
Labour	Placing the pins after the membrane is stretched	Routing every fibre above the ceiling	As with any module backlighting
Service	Access to the power supply and controller	Access to the illuminator	Access to the power supply and controller
Hot zones (sauna)	No – an element of a stretch ceiling	Glass fibres only, not PMMA	No – PVC membrane

Membrane, profiles and an installed example

The best contrast comes from a black gloss membrane: the points shine against a dark background and reflect in the lacquer, and the room visually gains depth. The profiles, harpoon and diffusers for a dark ceiling – the black versions from the catalogue – are described in the article Black stretch ceiling from 2K-Trade; it also covers what not to do on gloss (for example an LED strip without a diffuser).

What such a ceiling looks like after installation is shown by the photo of a starry-sky bedroom in the project gallery of our installation partner (GRAF Ceilings & Walls / ANVAPOL): black gloss with point lighting – sufitynapinane.eu/realizacje. It is the partner’s installation, not 2K-Trade’s; the components come from our catalogue.

Frequently asked questions

Do Starsky pins need a fibre-optic projector?

No. According to the product card the pins are compatible with LED strips and LED modules, white and RGB – the light source is placed above the membrane and the pins conduct it into the room. A projector and a fibre bundle are a separate, classic method.

How much space above the membrane do Starsky pins need?

The product card gives about 5 cm of free space. A classic fibre-optic system needs more – room for the illuminator and for routing the fibres.

Are optical fibres suitable for a sauna?

Typical decorative PMMA fibres are not resistant to high temperature; for a sauna glass fibres are used, chosen with the supplier of the system. Starsky pins are an element of a stretch ceiling and are not intended for hot zones.

Can a starry sky be made on a light membrane?

It can, but the contrast is lower than on a dark one. The best effect comes from a black gloss membrane – the points shine against a dark background and reflect in the surface.