Unlike any light bulb you know, Forest Anion™ Light Bulbs feature a negative ion generator that emits negative ions into the air. These negative ions neutralize positive ions that can be present in the surrounding. With Forest Anion™ Light Bulbs, those nasty airborne particles like Smell, Odour, Smoke, Fumes, even harmful chemicals etc. will be thoroughly eliminated, leaving the air cleaner, fresher and healthier.