PLA SUNLU glow in the dark PLA filament contains phosphorescent materials, which can glow in the dark after absorbing light energy. If it is exposed to UV lights, the luminous effect will be better. SUNLU PLA glow filaments can be made into prints that glow at night, which is very suitable for printing decorations for party and Parties. We recommend printing at a nozzle temperature of 200-210°C, bed temperature of 50-65°C, printing speed of 50-100mm/s.