After Glow Flakes will glow for up to 8 hours after being charged with standard light. After Glow can also be supercharged by using a hand held LED light. Use After Glow Flakes to create unique decorative floors that also serve a purpose in case of emergency. Use on floors that demand allotO of attention, in Garages to create an evening glow or in commercial floor areas to create a safe floor in case of emergency.