Sunco Lighting 1 Pack 4FT 48 Inch T8 Tube LED Light Bulbs 18 Watt (40 Equivalent) Frosted 5000K Kelvin Daylight 2200LM Bright White Light Single Sided Connection Bypass Ballast - ETL & DLC LISTED Top Rated T8 Tube Lightbulbs (Frosted) ENERGY STAR and ETL LISTED - Meets strict efficiency, quality and lifetime criteria CONSERVE ENERGY - Save up to 55% on your electric bill with Sunco Lighting long-life 50,000 hour LED's. Low power usage replacement for incandescent, halogen and fluorescent lightbulbs. APPLICATIONS - Indoor, Fixtures, Home, Shop, Office, Garage, Warehouse, Kitchen, Basement, Bathroom, Workshop ADVANTAGES - 3 Year Warranty | Super Bright | Saves Energy | NO Flickering | Contains NO Mercury | Emits NO UV/IR Light | More Durable & Less Maintenance - Contractor / Electrician Preferred Lights