To maximize the Glow Illumination Technology, the "FIRST AID KIT" glow label needs periodic exposure to artificial or natural light. Exposure to natural light will result in a stronger glow compared to normal indoor lighting, The intensity and duration of the glow may vary depending on the length of light exposure. For instant illumination, a flashlight can be used to charge the "FIRST AID KIT" glow label and will intensify its Hi-Visibility feature.