A UV light is required to show the presence of the Glitterbug Potion, Glitterbug Powder or Glitterbug Gel. They will all be invisible under normal light but the UV torch will then make it glow.
Our torches are made of aluminium and are designed for rough environments such as class rooms and hospitals.
Note: They use a specific wavelength that is optimised for Glitterbug. They are UV-A lights which are also safe to use.