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A lovely place to start
Downloads contain a shell and optional loose diffuser, laid out separately. Multiple outline letters may be separate pieces. Lighting parts are not included. Check clearance, attachment and lighting hardware before making an illuminated object.
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Separate-part 3MF export is not available today.
Open the file in your slicer, check the scale and thin details, then choose settings for your printer and material.
Start with the shell, not a finished lamp
Letter Glow makes letter-shaped shells or rounded word boxes with optional loose diffuser inserts. The download has no LEDs, wiring, power supply, connectors or electrical design. It does not turn a print into an assessed lighting product. You can use the shell as a decorative object without illumination, or separately plan an appropriate lighting assembly. Keep that distinction in mind when choosing dimensions. The digital preview shows surface geometry and illustrative colours; it is not a prediction of brightness, light diffusion or operating temperature.
Choose a letter with enough room
A bold capital letter gives the cavity more useful space than a delicate outline. The tool accepts up to eight letters or numbers, but a longer word can grow far beyond a small printer's bed. Try one letter first. The default shell is about 85 mm high with a 22 mm depth and a 2 mm wall. A rounded lightbox keeps a short word together on a broader plaque. Separate outline letters may remain separate pieces, so inspect the export before assuming a word is one connected object.
Treat the diffuser as a fit sample
The optional diffuser is a thin inset piece exported beside the shell. Clearance reduces its outline relative to the cavity; the default is a starting point rather than a calibrated press fit. The insert is loose and has no automatic fastening system. Measure the printed opening before selecting an attachment method. Decoration belongs on the diffuser, so enable it before adding motifs. A word-box design can include raised lettering as another named part. Preserve those layers' relative position when inspecting a multipart file in a slicer.
Inspect walls and floor separately
A shell needs continuous wall paths and a sound floor. For an initial 0.4 mm nozzle experiment, try a 0.2 mm layer height and inspect how the slicer fills the 2 mm walls. Print orientation changes where supports might be needed. The thin diffuser deserves a separate layer review; too few layers or a poor first layer can affect flatness. These are settings to test with your own machine, not a validated profile. Choose materials and any lighting hardware according to their actual requirements and avoid assuming printed plastic tolerates heat.
Understand the compact export layout
The shell and diffuser are arranged along the axis that reduces the longest side of their combined footprint. Their separate placement is intentional: it allows both to reach the bed without overlapping. Read the full model dimensions rather than only the letter-height control. The printer-fit warning appears above 220 × 220 mm, but smaller machines still need their own check. Allow space for a brim. Splitting the loose diffuser in a slicer can be better than scaling the entire assembly, since scaling also changes wall thickness and clearance.
Troubleshoot geometry before assembly
If a diffuser fails to form, choose a bolder font, enlarge the letter or reduce an excessive clearance. If narrow cavities disappear, compare their sliced paths with the mesh. Long word boxes can curl; reduce the size and examine bed adhesion before repeating them. Multiple loose letters need independent support and mounting decisions. Save the settings for the shell and insert together so you do not accidentally pair different revisions. Test fit without force. An acceptable mesh or a tidy shell does not establish the safety of any electrical assembly placed inside it.
Frequently asked questions
Does this maker include electrical parts?
No. It generates shells and optional loose diffuser inserts only. Lighting hardware, wiring, power and attachment must be planned separately.
Why is the diffuser beside the shell?
The parts are laid out separately for printing. The export chooses a compact direction; you can split and rearrange separate pieces in a slicer.
Can I make a whole word?
Yes, within the eight-character limit. Use the rounded word-box style for a shared enclosure and inspect the complete bed footprint.
Is the diffuser a guaranteed snap fit?
No. It is a loose inset with adjustable clearance. Print a sample and decide on a suitable attachment after measuring the real parts.
Keep making
01. Pick a starting point
Choose a style in Design, then explore the details. The preview updates as you create. Undo and redo let you try a different direction.
02. Make it yours
Explore Decorate for little motifs or your own SVG. Move, rotate, raise or engrave the details. Add your words and mix a colour palette. Preview colours are inspiration; STL files contain geometry only.
03. Bring it to life
Save your settings to My makes or download an STL. Check scale, supports and small details in your slicer. Read the printing guides →