GO-3D Glow in The Dark PLA 3D Printing Filament Mini Value Pack 1.75mm 2X 225g Recommended Extrusion Temperatures: 190C-220C Normal PLA printing setting The color change occurs immediately after shut off the lights, For the best results, place the filament / printing object under sunlight / UV flashlight exposure and move it back in the dark area. 1.75mm, 225g Designed by GO-3D Print in California