UV-C ray is stronger than sunshine, 20 watt power, kill the dust and mites immediately, easily kill bacteria / mold / staphylococcus aureus / E. coli / pet parvovirus / influenza virus, remove kitchen odour / musty smell in the bedroom / bad smell from the wash-room / shoe box / fridge / and trash, break down tiny substances in the air, reduce asthma allergens.