Unlike any Light Bulb you know, Stegayoung Forest Anion Light Bulb 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 Stegayoung Forest Anion Light Bulb, those nasty airborne particles like smell, odour, smoke, fumes, even harmful chemicals etc. will be thoroughly eliminated, leaving the air cleaner, fresher and healthier.