Features: 1) Air purifying: Patent protected 2) Creates large quantity of anion to freshen the air 3) Elimination of poisons: Can eliminate various harmful germs and various Poisonous volatilizing chemicals in the air (such as benzene, toluene, Formaldehyde and ammonia) 4) Elimination of smell 5) Rapidly dispel smoke 6) Long life: Up to 8, 000/10, 000h 7) 1-year guarantee 8) Up to 7 years usage based on 3. 5 hours maximum usage per day 9) Energy efficient: Save up to 75% energy costs 10) Phosphors powder enhances lumen efficacy and color rendering 11) High light output 12) Applications: Bedroom, lobby, toilet, kitchen, scriptorium, assembly room, Smoking room, hotel, KTV, barroom, school, supermarket and library