This is not accurate.
An ion is a molecule or atom with a positive or negative charge.
An ANION is a "negative ion" (which is what you said there is no such thing as).
A CATION is a "positive ion."
An "ionizer" does work, because it creates ions and neutralize ions in the air that are associated with pollutants.
This item is revolutionary because it (1) is an energy saving bulb, and (2) also an air purifier, using the energy from the bulb itself.
Not only does it save money and is good for the environment, but it also cleans the air directly around you.
This is such a simple invention, but it will be huge.