3D Printer Filament Sunlu PLA Glow-in-the-Dark (White & Blue) – PLA Glow W-Blu

Sunlu PLA Glow-in-the-Dark Filament (White & Blue) is a PLA-based 3D printing material that alternates white and blue glow effects after absorbing light. It is formulated with phosphorescent additives that store light energy and release it in darkness; exposure to UV light increases the glow intensity. The filament is supplied on a 1 kg spool and is intended for FDM/FFF 3D printers that accept 1.75 mm or 3.0 mm filament diameters.

Advantages

The filament offers reliable dimensional accuracy and steady feeding thanks to tight diameter tolerances, which supports consistent layer deposition and higher print repeatability. It is packaged dried and vacuum-sealed with a desiccant to minimize moisture-related printing issues, enabling clog-free and bubble-free extrusion. The phosphorescent properties provide a visible glow after charging with light, making finished parts stand out in low-light conditions.

Suitable for

• Decorative models and illuminated ornaments
• Cosplay props and costume details
• Safety signs, markers, and visibility elements
• Gadgets and hobby prints that need a glow effect

When it may not be suitable

This filament is not recommended for applications requiring prolonged UV or direct sunlight exposure, as extended sun exposure can accelerate color fading of the glow pigments. It is also not ideal for high-temperature functional parts because PLA has a moderate heat deflection temperature and limited mechanical performance compared with engineering thermoplastics.

Key specifications

• Color and effect: White base with blue phosphorescent glow
• Available diameters: 1.75 mm (also available in 3.0 mm)
• Dimensional tolerance: ±0.02 mm (manufacturer specification)
• Recommended printing temperature: 200–210°C
• Bed options: use no heated bed with adhesive, or heat bed to 50–65°C without adhesive
• Recommended print speed: 50–100 mm/s
• Tensile strength (typical): 11–16 kgf (measured at 23°C, 1.75 mm)
• Elongation at break: ~4% (measured at 23°C, 1.75 mm)
• Melting temperature range: 165–180°C
• Heat deflection temperature: 55°C
• Density: 1.24 g/cm³
• Water absorption: ~0.5%
• Filament spool weight: 1 kg; approximate length for 1.75 mm: ~330 m
• Bubbles: manufactured to be bubble-free

How to use

Load the Sunlu PLA Glow-in-the-Dark filament into any FDM/FFF printer compatible with the chosen diameter (1.75 mm or 3.0 mm). Set the hotend temperature to 200–210°C and choose bed conditions according to your printer: either no heated bed with adhesive or a heated bed at 50–65°C without adhesive. Use a moderate printing speed in the 50–100 mm/s range and ensure good first-layer adherence. For stronger glow, expose printed parts to bright light or UV source before use. Store any opened filament in a dry environment or resealable bag with desiccant to preserve printability.

What to consider before purchase

• Confirm your printer supports the selected filament diameter (1.75 mm or 3.0 mm).
• PLA’s heat resistance is limited (heat deflection ~55°C); avoid high-temperature applications.
• Glow intensity depends on light exposure and may fade faster if exposed to direct sunlight over long periods.
• Accept that mechanical properties are typical for PLA and may not match engineering-grade plastics.

Usage recommendations

For best glow results, charge printed parts under strong light or a UV lamp for several minutes; avoid prolonged outdoor sun exposure to reduce pigment fading. Keep filament sealed with desiccant when not in use to maintain consistent extrusion performance.