10-Pack of Hyperikon T8 LED Light Tube, 4ft, 18W (36W equivalent), 4000K (Daylight), Single-Ended Power, Frosted Cover, UL-Listed & DLC-Qualified SAVE 55% INSTANTLY - Cut down your electricity bill by up to 55% by replacing 40W with 18W! 45,000 HOUR LIFETIME - With an astonishing life rating of 45,000 hours, or 21 years with 6 hrs/day of use, replacing your tubes is now a thing of the past. AWARD-WINNING - Hyperikon Award Winning LED T8 delivers a market leading minimum 100 lumens per watt to ensure you get the best lighting in your application. AUTHENTIC PRODUCT REVIEWS - Hyperikon works hard to ensure customers are satisfied. Our authentic product reviews are an honest reflection of real customers and their experience with our products and service. USA DEVELOPED & PATENTED - Hyperikon is a 100% US owned California based corporation specializing in LED lighting. Workspace and warehouse lighting Basement and parking garage LED lights Grocery stores and retailers Kitchen lighting School buildings, classrooms and hallways Office ceiling lights Hospitals and healthcare provider offices