Compact Fluorescent replacement bulbs are for use with preheat , rapid start and instant start lamp ballasts . Most commonly used for reading lamps and floor lamps . For une with dozens of full spectrum lamp models including Ver HappyEyes , Grandrich , Lights of America , Funds , Ergonomic , Adrenso , Balanced Spectrum , Colux , Solarex , Sunter Lighong , Tenser any many more . All of our FML type lamps come with 15 month wamanty and 10,000vs Avg Life Time