Want to take your 3D prints to the next level? Adding LEDs is one of the easiest ways to turn a simple design into something that really shines — literally.

Whether you’re building light-up signs, display stands, or glowing gifts, here’s how to integrate LEDs into your prints without the guesswork.

Start with the Right LEDs

You’ve got a few options:

• 5mm/10mm LEDs: Basic and easy to wire. Great for beginners.
• LED strips (12V or USB): Flexible and bright — perfect for edge lighting signs or underglow.
• Neopixels / WS2812: Individually addressable RGB LEDs for advanced projects.

Tip: For most hobby builds, start with LED strips or pre-wired 5V lights. They’re simple, safe, and easy to power.

Design with LEDs in Mind

Instead of jamming wires into a finished print, build the channels and cutouts into the model itself.

Try this in your CAD or slicer:

• Add hollow tubes or trenches for wires
• Leave slots for LED strips
• Use translucent filament for glowing sections
• Model a cavity for a coin cell holder or USB port

If you're not modeling from scratch, remix existing files from Thingiverse or Printables and add LED cutouts with Tinkercad or Fusion 360.

Power & Wiring Tips

• Keep it simple: 5V USB or 3V coin batteries are plenty for most prints
• Use heat-shrink tubing to insulate solder joints
• Hide wiring under the base or inside walls
• For signs, run power out the back or through a printed channel

No soldering iron? Look for pre-soldered LEDs or use LED strip connectors.

Diffusing the Light

Raw LEDs are bright and directional. For a smoother glow:

• Use frosted or translucent white filament
• Print a thin diffuser panel (0.8–1.2mm thick)
• Add walls between LEDs to avoid hotspots

Even a simple top layer printed in vase mode can soften and spread the light beautifully.