Building a Polyhedral Lamp: A Dual of a 4-Frequency Icosahedral Geodesic Sphere

For the past few months, I’ve been experimenting with a completely new way to build illuminated polyhedrals — combining laser-cut acrylic, 3D printed structural components, and individually lit faces into a modular “lego-like” assembly system. This latest project became one of the most ambitious pieces I’ve created so far: a fully illuminated Dual of a 4 Frequency Icosahedral Geodesic Sphere. What started as an idea I wasn’t even sure would work eventually turned into a glowing geometric sculpture with 162 illuminated faces and an incredibly satisfying snap-fit assembly process.

The Inspiration

I’ve always been fascinated by polyhedrals, geodesic structures, and the way mathematical forms can become functional art. For this build, I wanted to create something that felt almost alive when illuminated — a glowing sphere where every face became its own individual light source.

The biggest challenge wasn’t just creating the geometry. It was figuring out how to build a structure this complex without relying heavily on glue or fragile assembly methods.

That led to the idea of designing the entire polyhedral as a modular interlocking system.

Generating the Geometry

The base geometry for the lamp was generated using Stella4D, which allowed me to create the STL model of the dual geodesic sphere structure. From there, the model was imported into Autodesk Fusion 360 for the real engineering work.

This polyhedral contains:

  • 162 total faces
  • 4 unique face shapes
  • Custom internal connector geometry
  • Integrated LED mounting points
  • Interlocking structural components

Every connector and face interface had to be designed carefully so the structure could hold itself together through pressure fitting alone.

Designing a “Lego-Like” Assembly System

One of the most exciting parts of this project was developing a completely new assembly technique.

Each structural connector was designed as a modular 3D printed component that locks together with neighboring pieces. Every connector also houses a single LED pixel bulb, turning the internal framework into both the structural skeleton and the lighting system.

The laser-cut acrylic faces slide into a precise 1/8″ recessed channel built directly into each printed connector piece. Once assembled, the faces are held securely in place entirely through tension and compression.

Assembly

The result is surprisingly satisfying to assemble — almost like building a giant geometric LEGO sculpture.

The only glued components are the first five connectors at the bottom of the sphere, which create the mounting point for the lamp base. Everything above that is completely pressure fit and mechanically locked together.

Materials & Fabrication

The illuminated faces were laser cut on my Glowforge using Milky White Cast Acrylic from Houston Acrylic. The translucent acrylic diffuses the LEDs beautifully, creating a soft glowing effect across the entire surface.

The structural pieces were printed on a Bambu Lab X1-Carbon using three different PLA filament colors to add visual depth and contrast throughout the frame.

Each LED pixel bulb pressure-fits directly into the back side of the connector pieces, eliminating the need for additional mounting hardware or adhesives.

Lighting & Electronics

Inside the sphere is a fully addressable LED system controlled by a Dig2Go running WLED.

The controller is powered using a standard wall socket power adapter and allows the lamp to run dynamic lighting animations, color transitions, and programmable effects across all faces of the polyhedral.

Because every face contains its own light source, the entire sculpture feels animated — almost like a living geometric organism.

The Final Result

What I love most about this project is how it blends mathematics, engineering, fabrication, and art into a single object.

From a distance, it looks like a glowing futuristic sculpture. Up close, you begin to notice the repeating geometric patterns, layered construction, and intricate modular details hidden throughout the structure.

One of my Favorites!

This project pushed nearly every part of my workflow:

  • Parametric geometry generation
  • CAD engineering
  • Precision laser cutting
  • Multi-part 3D printing
  • Electronics integration
  • Structural problem solving

And honestly, there were plenty of moments where I wasn’t sure it would actually come together.

But seeing the final sphere illuminate for the first time made every failed prototype and redesign worth it.