Luminous PLA or luminous PETG: Which phosphorescent filament is the right choice for your 3D prints?
SUNLU's phosphorescent filaments enable 3D prints that absorb light and then glow in the dark. Depending on the project, however, PLA Glow and PETG Glow meet different requirements.
A glow-in-the-dark filament is not just a decorative material. It can turn a normal print into an object that remains visible in the dark, a piece of signage, party decoration, or a more memorable creative accessory.
For makers, families, decoration designers, desktop 3D printer users, and small-scale sellers of printed models, the choice between PLA Glow and PETG Glow primarily depends on two questions: Do you want the print to be as easy as possible, or do you need a more robust and durable model?
This guide compares the two phosphorescent SUNLU filaments and helps you choose the right material for your project.
Quick Overview: Which filament should you choose?
Choose SUNLU PLA Glow if you are looking for an easy-to-print phosphorescent filament for decorations, creative models, gifts, decorative toys, and projects where straightforward printability is the priority.
Choose SUNLU PETG Glow if you are looking for a more robust phosphorescent filament that is better suited for functional parts, signage, durable objects, or prints that are handled more frequently.
Two luminous filaments, two different areas of application
SUNLU PLA Glow
Ideal for: Decorations, creative objects, gifts, figurines, light signage, party accessories, and beginner-friendly projects.
SUNLU PLA Glow was developed to create a visible glow effect while providing an easy printing experience. It is particularly suitable for users who want to create glowing prints quickly without using overly complex settings.
Discover PLA GlowSUNLU PETG Glow
Ideal for: Signage, lettering, jewelry, long-lasting decorative objects, frequently handled parts, and functional luminous projects.
SUNLU PETG Glow combines the phosphorescent effect with the properties of PETG: higher strength, good layer adhesion, and a more stable result for parts that are used or handled more frequently.
Discover PETG GlowParameter comparison: PLA Glow vs. PETG Glow
| Parameter | SUNLU PLA Glow | SUNLU PETG Glow |
|---|---|---|
| Material type | Phosphorescent PLA | Phosphorescent PETG |
| Diameter | 1.75 ± 0.03 mm | 1.75 ± 0.02 mm |
| Luminescent content | 10% photoluminescent pigment | 10% luminescent powder |
| Recommended nozzle temp | 200–240 °C | 235–250 °C |
| Printing temp by speed | 200–210 °C: 50–100 mm/s 210–240 °C: 100–200 mm/s |
235–245 °C: 50–100 mm/s 245–250 °C: 100–200 mm/s |
| Print bed temperature | 50–60 °C | 70–80 °C with adhesive Unheated bed with adhesive possible |
| Recommended drying | 50 °C | 60–65 °C, 1–4 h |
| Recommended humidity | < 20% RH, sealed with desiccant | < 20% RH, sealed with desiccant |
| Net weight | 1 kg / spool | 1 kg / spool |
| Length | Approx. 330 m / 1 kg | Approx. 330 m / 1 kg |
| Tensile strength | 40 ± 6 MPa | 48 ± 10 MPa |
| Flexural strength | 65 ± 6 MPa | 70 ± 10 MPa |
| Vicat softening temperature | 54 °C | 71 °C |
| Best choice for | Decorations, gifts, creative objects, simple projects | Robust objects, signage, frequently handled parts, functional projects |
Why choose PLA Glow?
PLA Glow is the most accessible choice if you want to try out the glow effect or create decorative models without making the printing process more complicated. It is particularly suitable for prints where visuals and the night effect are more important than mechanical strength.
Key advantages
- Easier to print: ideal for users who want to achieve stable results using settings similar to classic PLA.
- Very well suited for decorations: perfect for party objects, children's models, room accessories, figurines, and small creative items.
- Clearly visible glow effect: photoluminescent pigments absorb light and then create a visible glow in the dark.
- Good choice for beginners: recommended if you are mainly printing display pieces or parts with low stress.
Printing ideas with PLA Glow
Room decoration
Stars, moons, small animals, decorative lamps, and objects that glow softly at night.
Party objects
Ornaments, party supplies, Halloween decorations, badges, and small glowing gifts.
Light signage
Small markers, labels, arrows, signs, and elements that remain visible in dark environments.
Why choose PETG Glow?
PETG Glow is intended for users who want to maintain the glow effect while simultaneously obtaining a more robust part. It generally requires a higher printing temperature than PLA, but offers better strength and higher reliability for objects that are handled or used more frequently.
Key advantages
- More robust than PLA: the better choice for parts that need to be handled more frequently.
- Good layer adhesion: useful for luminous objects that need to remain stable.
- Suitable for functional projects: signage, lettering, mounts, jewelry, markers, or practical parts.
- High dimensional accuracy: the tolerance of ±0.02 mm supports uniform extrusion and reliable results.
Printing ideas with PETG Glow
Signage in the dark
Markers, arrows, identifiers, signs, and elements that remain visible in a dark workshop, garage, or hallway.
Durable accessories
Mounts, keychains, jewelry, small regularly used objects, and more robust decorative parts.
High-quality creative projects
Glowing lettering, display pieces, original designs, and models that combine aesthetics and strength.
How to achieve a better glow effect?
For a more visible glow, the print should be exposed to a light source before use in the dark. UV light usually provides faster and more intense charging, but sunlight or fluorescent light can also charge the material.
For a better visual result, models with a well-visible surface, simple raised features, and shapes that can absorb light well are suitable. Very thin or very dark objects may appear less bright.
As with all technical or functional filaments, spools should be stored dry and resealed with desiccant after use.
Which filament should be recommended by customer type?
| Customer profile | Recommended filament | Reason for recommendation |
|---|---|---|
| 3D printing beginner | PLA Glow | Easier to print and ideal for getting to know the glow effect. |
| Families or creative printing | PLA Glow | Perfect for decorations, gifts, children's objects, and playful models. |
| Maker printing useful objects | PETG Glow | Better choice for markers, signs, mounts, and frequently handled objects. |
| Seller of printed products | Both | PLA for simple decorative models; PETG for objects with higher functional value. |
| User wanting a more durable part | PETG Glow | More robust and better suited for parts that need to remain resistant over time. |
Final recommendation
If your priority is simplicity, decoration, and the fun of creating glowing models, SUNLU PLA Glow is the best starting point. It is highly recommended for beginners, families, and creators of decorative models.
If your priority is strength, precision, and durability, SUNLU PETG Glow is the more suitable choice. It is better for signage, accessories, frequently handled parts, and projects where the glow effect is to be combined with higher stability.
For a complete collection of phosphorescent filaments, it is worth using both: PLA Glow for quick creative ideas and PETG Glow for more robust luminous projects.
FAQ
What is the main difference between PLA Glow and PETG Glow?
PLA Glow is easier to print and works very well for decorative objects. PETG Glow is more robust and better suited for frequently handled parts or functional projects.
Does the filament glow without prior light exposure?
No. The filament must first absorb light, for example from a UV lamp, sunlight, or fluorescent light. Afterward, it releases this energy as a visible glow in the dark.
Which filament is suitable for Halloween, parties, or room decoration?
PLA Glow is generally the better choice for this type of project, as it is easier to print and very well suited for decorative objects.
Which filament is suitable for signs, markers, or more robust objects?
PETG Glow is more recommended for signage, markers, signs, mounts, and objects that are handled more frequently.
Do luminous filaments need to be dried?
Yes. To maintain good print quality, spools should be stored dry and resealed with desiccant after use.
