The Ionmax UV LIGHT Bulb replacement is for Ionmax ION388 Tower Ioniser, which is one of the best air purifiers on the market. Designed for home, office and indoor applications, it uses an advanced air filtration system that will clean the air and remove pollutants and germs. The Ion388 uses a germicidal UV lamp to kill a whole host of bacteria, germs, mould and pollutants, whilst still remaining within the ozone friendly limits.