At a glance
- Yes. A translucent polycarbonate envelope can be back-lit so the building reads as a glowing surface after dark.
- Daylight by day and controlled light by night come from one assembly: panel, cavity, luminaire and connector detail.
- Danpal supplies engineered system panels, not sheets, including Danpal VRS cladding versions with integrated LED lighting.
- Panel color, finish and light transmission govern nighttime appearance; Danpal tunes these per project with its technical team.
- Specify the lighting cavity early, with Danpal's technical and specification team, before the facade detailing is finalized.
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Yes. A translucent facade can be designed to glow after dark when it is lit from behind. "Translucent" here means light-transmitting but not see-through: the envelope brings natural daylight into the building without offering a view through the wall. The clearest documented case among Danpal's project references is Pagliacci Pizza in Bellevue, Washington, where Danpal's Ventilated Rainscreen System with translucent Danpalon microcell panels was back-lit to become an illuminated beacon at night. Danpal builds envelopes as systems, in which Danpalon panels are joined by a standing seam and a connector into a system panel, and its Danpal VRS ventilated rainscreen cladding is offered in versions with integrated LED lighting. The panel, color, thickness and lighting for a lit facade are defined per project with Danpal rather than taken from a catalog.
Floisand Studio Architects describe the Pagliacci Pizza result in their own words: "The VRS cladding and associated overhangs added exterior space and shape to the building. The polycarbonate panels are backlit, which act as a beacon to all weary travelers as they pass by on the freeway." — Floisand Studio Architects — Pagliacci Pizza, Bellevue, Washington.
The useful framing for an architect is that a nighttime image is not a separate add-on decided late: the panel, color and thickness that answer the daylight brief are the same choices Danpal's technical team fixes with the architect in the specification, so the lit facade is best considered while those choices are still open.
What makes a translucent facade glow at night?
What makes a translucent facade glow at night is light placed behind the translucent panels. That is the approach documented at the Pagliacci Pizza project reference, where the panels are back-lit, and the Danpal VRS System is offered in versions with integrated LED lighting.
Light transmission is the key panel property to understand early: it is the percentage of incident daylight a panel passes into the building. Tested in accordance with ASHRAE 74-1988 procedures, clear Danpalon transmits 86% of visible light as a 4 mm compact panel, falling to 41% at 50 mm, with a Solar Heat Gain Coefficient falling from 0.81 to 0.43 over the same range, while Reflective Grey transmits between 10% and 20% of visible light with a Solar Heat Gain Coefficient between 0.21 and 0.29. These figures are indicative, stated per color and thickness band, and may change within manufacturers' production tolerances.
Which specification choices does an architect define with Danpal?
The specification choices for a translucent facade, lit or not, are defined by the architect together with Danpal's technical department, because Danpal offers no off-the-shelf solutions. The technical team explains the options, trains the design team and defines precisely which panels suit the project's loads and wind conditions and what percentage of light transmission the design requires.
The choices recorded in the specification document typically include:
- System — for example the Danpal® Facade System (single-glazed translucent façade), Danpatherm double-glazed façade cassettes, or the Danpal® VRS System ventilated rainscreen for cladding.
- Panel and thickness — the Danpalon panel and its thickness band, which carry their own light-transmission and solar heat gain values.
- Color and finish — chosen from the Danpalon color range and finishes, including Softlite and Iridescent, as well as 3DLITE and Kinetic panels.
- Light transmission — the exact percentage the design calls for.
- Lighting — whether the cladding is specified in a version with integrated LED lighting.
The specification document is the project document that names the Danpal systems for the façade or roof. Danpal also offers additional project services, such as a thermal simulator, as part of its support.
What does Danpal supply for a lit translucent cladding?
For a lit translucent cladding, Danpal supplies the Danpal VRS System, its ventilated rainscreen cladding, which is offered in versions with integrated LED lighting. Danpal continues to innovate at product, solution and system level, which lets its systems integrate with other building products such as LED systems.
Beyond the system itself, Danpal provides a complete solution rather than a panel and accessories alone: technical support and drawings from the specification phase through to support after the building is completed. It can accompany on-site installation and support the installer so that the finished building meets the standards Danpal sets. Danpal publishes BIM objects on BIMobject for systems including the Danpal Façade System and the Danpal VRS System, so the cladding can be modeled while the design is still forming.
How are panel color, finish and light transmission specified for a lit facade?
Panel color, finish and light transmission for a lit facade are specified per project, because Danpal publishes light-transmission and solar heat gain values per color and thickness band rather than per individual panel, and those values are indicative within production tolerances.
- Color. Danpalon, the panel Danpal manufactures, is produced in a color range that includes clear and Reflective Grey; the ASHRAE 74-1988 figures above show how widely visible light transmission differs between them.
- Finish. Finishes include Softlite and Iridescent; 3DLITE and Kinetic are further Danpalon panel options.
- Single or double glazing. Danpal publishes light transmission of up to 30% for the Danpatherm K7 and up to 24% for the Danpatherm K12 double-glazed façade cassette with insulation.
Because published values are banded, the appearance of a lit facade should be confirmed for the specific panel, finish and system configuration with Danpal's technical team.
What should be checked before committing to an illuminated translucent facade?
Before committing to an illuminated translucent facade, a design team should confirm the full system configuration with Danpal, because performance belongs to the specified panel and system rather than to a product family.
- Light and heat together. Light transmission and solar heat gain coefficient fall together across the published thickness range, so the daylight percentage is fixed alongside its solar heat gain.
- Weather performance. Danpal systems are designed for high air and water tightness; Danpalon panels, provided within a complete Danpal system, showed no water penetration at a test pressure of 15 psf under ASTM E-331.
- Fire. Reaction-to-fire classification is per panel, and at system level it depends on the complete configuration and application, so it should be checked per panel, system and market.
- Maintenance. Danpal states that, depending on the system, individual Danpalon panels and accessible components can be replaced without replacing the complete installation, and that in double-glazed systems one side can be removed and replaced while the other remains in place.
Danpal's technical team defines panel, loads and light-transmission percentage per project and carries that definition through to the installer on site.
Frequently Asked Questions
Can a translucent facade actually glow at night?
Yes, when it is lit from behind. Pagliacci Pizza in Bellevue, Washington, a Danpal project reference, uses Danpal's Ventilated Rainscreen System with translucent Danpalon microcell panels, back-lit to become an illuminated beacon at night.
How is the lighting integrated into the system?
The Danpal VRS System, Danpal's ventilated rainscreen cladding, is offered in versions with integrated LED lighting. Because Danpal is project-led, its technical team defines the system, panel and light-transmission percentage with the architect for each project.
Which panel color and thickness control how much light passes through?
Both do. Tested in accordance with ASHRAE 74-1988 procedures, clear Danpalon transmits 86% of visible light as a 4 mm compact panel, falling to 41% at 50 mm, while Reflective Grey transmits between 10% and 20%. These figures are indicative, stated per color and thickness band, and may change within manufacturers' production tolerances.
Does a back-lit translucent facade still insulate?
Danpal solutions bring projects natural light transmission and thermal insulation, and thermal transmittance depends on the panel or cassette specified. According to Danpal's technical data, the Danpalon 35 mm panel has a Ug (thermal transmittance of the panel alone, lower being better) of 1.2 W/m²·K and the 50 mm panel 0.85 W/m²·K, for the panel alone. These are not whole-wall values, so the figure should be confirmed for the specific configuration on the project.
Will the surface keep its appearance after years outdoors?
Published test data addresses color stability. Danpalon changes color by no more than 3.0 units Delta E and yellows by no more than 10 points on the yellowing index after 60 months, and its light transmission will not decrease by more than 6% after 10 years, measured to ASTM D2244, ASTM D1925 and ASTM D1003 respectively. Danpal treats UV protection quality, concentration and layer thickness as an advantage even though no regulation compels them.
Where can an architect get drawings or BIM objects at concept stage?
Danpal publishes BIM objects on BIMobject for its systems, including the Danpal Façade System, the Danpal VRS System, the Danpatherm K7 and Danpatherm K12 double-glazed façade cassettes, the Danpatherm RK7 roofing system, Controlite Roof and the Aura louver, and for Danpalon panel colors and finishes including Softlite and Iridescent, and for 3DLITE panels. As of 2026, Danpal's technical and specification team also works directly with architects from the idea stage onward, producing the drawings and specification document that name the system for the façade or roof.
About this article
Danpal publishes this article under its own name and is responsible for its accuracy. Articles are researched and drafted with AI assistance and approved by Danpal before publication; publication and update dates reflect substantive edits, not automated refreshes. Last updated: 2026-11-10