Glowing in Dark Green PLA Filament: Our Glow in Dark Sereise PLA Filament, It Will be Glowing in Dark after Absorbing UV Light. It Looks Natural Color at Day, While It Has Amazing Fluorescent Green in Dark After Exposure to Strong Sunlight or UV light; To Get Amazing Luminous Effect, Pls Expose the Finished Printed Item to Directly Bright Sunlight, or UV Light for Around 20-30 Minutes; Recommend Light Sources: UV Light, Directly Strong Sunlight. Directly Sunlight Works Quite Good | High Quality and Strong Compatibility: 1.75mm Diameter, High Quality Controlled, We Use the Premium Quality Raw Material to Keep Longer Time Luminous Effect; In Order to Keep Better Luminous Effect, It's Suggest to Exposure Filament at Sunlight Around 30 Minutes. Perfectly Compatible with Most of the FDM 3D Printers and 3D Pens in Market, Melt Well and Feed Smoothly, No bubble, No Jamming, No Warping, Easy to Print | 100% Tangle-Free Tips and Printing Setting: For our Filament, We Use the Servo Machine, To Doing Our Best to Make the Filament Line Winding as Neatly as It Can, Also All of Our Filament are 100% Tangle-Free during Production, After Each Time Use, Pls Kindly Fix Filament End, Pls Make Sure to Insert Free End of Filament into Spool Holes, to Avoid Being Tangled for Next Time Use; Suggest Print Temperature: 200°C-220°C | Widely Application and Package: Our Glowing in Dark Series PLA, After Absorbing UV light, It's with Amazon Strong Fluorescent Effect in Dark, It's Very Suitable for Printing Gift, Decorations for Party, Thanksgiving and Christmas, Glow Sticks, Lampshades, etc. Each Spool Filament Net Weight is 1KG, Vacuum Packaging with Dryers to Keep It Dry and Clean | After Sales Service & Warranty: For Our Glowing in Dark Series PLA, It's Easy to Print and Use, If You Have Any Question During Use, Pls Kindly Inform us at Any Time, We'll Always Here for You, We Are High Confidence of Our PLA Filament, Pls Kindly Try and Test, We Are Always Here to Serve You Best