Only Contractor InstantFit T8 LEDs has been proven to work with 216 types of ballast, delivering even light output, energy savings and a long average lifetime. Proven over 40% energy savings (Savings based on comparison to F32T8 electronic instant start systems.);No visible flicker - All InstantFit lamps are below 1.02 (Refer to NEMA77, IEC 61547 & IEC 63158 standard for SVM - Stroboscopic Visibility Measure).;Driver Usage - A variety of drivers enable optimizing the light output and wattage consumption for each application. The InstantFit LED lamps provide hassle-free installation with simple lamp-for-lamp replacements. They deliver what we promise, with at least 40% energy savings, flicker-free performance, and the life you would expect .Other lamps claim compatibility but only InstantFit (UL Type A) has been proven to work with over 350 ballasts and drivers, delivering even light output, with proven energy savings and a long average lifetime. End users will be delighted being under these comfortable and high quality InstantFit lamps with no visible flicker and optimized optics. Energy managers will enjoy the InstantFit lamps too as they can count the savings delivered by our lamps. To enjoy more energy savings, the InstantFit lamps can be paired with the Advance TLED drivers to create a Type C system. Compatibility - Each lamp is compatible with several drivers.;Lifetime delivered: Average life rating of 50,000 hours1 (Tested to B50 L70 requirement with a ballast factor <lt/> 0.88.);Lamp sizes range from 2-foot to 8-foot and U-bend with a variety of lumen outputs.;Proven product history: Philips is a company with a long history of innovation and reliability in the lighting industry.;Built-in surge and shock protection Warehouses;Schools;Offices