Bambu Lab PLA Glow Filament 1.75mm 1kg

PLA Glow carries luminous powder through the filament itself, so a print charges up under any light and then glows once you switch it off. Five colours — green, blue, pink, orange and yellow — each glowing in its own shade rather than all going the same pale green.

It prints like ordinary PLA: no enclosure, cool bed, nothing special about the profile. Two things to know. The nozzle needs to be 0.4mm or larger, and it will not run in an AMS Lite — use the spool holder, or an AMS / AMS 2 Pro.

At a glance

Worth knowing

Not compatible with the AMS Lite. Run it from the external spool holder instead. The AMS and AMS 2 Pro both handle it without trouble.

The glow is charged, not powered. Leave a print under a lamp or in daylight for a few minutes and it will hold a visible glow for a while afterwards, brightest in the first minutes and fading gradually. Thin walls glow less than thick ones simply because there is less luminous powder in the light path — if the effect matters, print it solid rather than at low infill.

Strength is close to ordinary PLA. Bending strength is identical to PLA Basic at 76 MPa and impact strength is marginally better at 27.3 kJ/m², so you are not giving up toughness for the effect. It is noticeably less stiff, though — 2030 MPa against Basic's 2580 — so a long flat part will flex a little more than you might expect.

The luminous powder is abrasive. Stay at 0.4mm and up, and keep an eye on nozzle wear if you print a lot of it, in the same way you would with any filled filament.

Storage

Bambu specifies under 20% RH, sealed with desiccant, and 55°C for 8 hours before printing. A sealed box with fresh desiccant does the job, or a filament dryer if you have one. Drop a cheap hygrometer in the box so you're not guessing.

As filament takes on moisture you'll hear popping or hissing at the nozzle, then see stringing and rough surfaces, and eventually the strand goes brittle enough to snap in the tube. That's almost always moisture, not technique. Dry it at 55°C for 8 hours and it usually comes back.