1 Pack . Cleans the air . Energy efficient & helps saves money . 7W (25W equivalent) . 3500 Kelvin . 2-Year warranty . 1.5 Dia. x 5 in. H 1-Pack energy efficient compact fluorescent light bulb that cleans the air. Built-in negative ion generator removes allergens such as dust, pet dander, odors, tobacco smoke and more. Saves energy and leaves indoor air fresher and cleaner. Great for asthma and allergy sufferers.