Lasts 7 years based on 3 hours average use per day. Replacement uses only 23 watts. 23 watts=100 watts. Indoor interior: light output: 1600 lumens. Energy used: 23 watts. Life: 8000 hours. To save energy costs, find the bulbs with the light input you need, then choose the one with the lowest watts. Lamp contains mercury. Manage in accordance with disposal laws. Energy star: as an energy star partner, osram sylvania has determined that this product meets the energy star guidelines for energy efficiency. Unconditional guarantee: if for any reason you are not completely satisfied by your purchase, simply return the product with proof of purchase for a replacement or refund, whichever you prefer. We welcome any comments or questions you may have. When writing, please include the product code found below. Questions? 1-888-423-0139. Limited warranty: 7 years based on normal household usage in accordance with package and bulb directions. Note: reliable operating temperature range 0 f/-18 c to 100 f/40 C. 120v. mini blanca sauve. Soft white mini. Energy saver. Saves $61.00 in energy costs**.