With promo code “HDUS02”, this Dingsun 3D Firefly PLA filament 2-Pack drops to $18, down from $62. Shipping is free from a U.S. warehouse. The glow comes from strontium aluminate particles that absorb light and slowly release it as a glow that can last several hours after charging, with green filament producing the brightest and longest-lasting effect among color options. This deal ends October 16. Buy Now at AliExpress
Features
Made from solid PLA material 0.07″ filament diameter, the standard size for most FDM 3D printers Available in 0.55-lb., 1.1-lb., or 2.2-lb. spools Glows in blue or green after exposure to light Shelf life of 1 year
