Hyperikon T8 T10 T12 Tube Light, 4ft Dual-End Powered 18W, Frosted 5000k, 10 Pack Compatible with over 100 existing T8 ballasts (T8 Only). In addition, its dual-purpose functionality will allow this tube to operate either with ballast bypassed (18 Watt) or with the ballast (22 Watt). Bypassing will be required in the case of ballast incompatibility. If the tube turns on and off with consistent delays, or if it turns off completely after some use the tube is incompatible with the existing ballast. In this event simply bypass the ballast to restore full functionality of the tube and its lighting capabilities. EASY INSTALL - Difficult installation is now a thing of the past! Our simple installation guide provides step by step instructions for easy installation. Consumes only 18W when bypassing the ballast and 22W when tube is left operating with ballast. Provides a stunning 2200 lumens whether operated with or without ballast. No tombstone hassle. 5 YEAR WARRANTY - Hyperikon's 5-year unlimited warranty means we've got you covered! Contact us for an easy and fast replacement. 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