Feit Electric’s 18-watt (32-watt equivalent) Selectable White Direct Replacement or Ballast Bypass (Type AB) Non-Dimmable LED Lamp replaces either T8 (Type A) or T8 and T12 (Type B) fluorescent and LED tubes. Install this versatile light in two ways: plug and play direct replacement using the existing electronic ballast with no rewiring necessary, or direct wire installation bypassing the ballast. Bypass the ballast for efficient operation and less maintenance over time. This 1800-lumen LED light emits the same light output level as traditional bulbs, using up to 43.8% less energy. Choose from Bright White 3000K, Cool White 4000K, Daylight 5000K, or Daylight Deluxe 6500K before installing to have the right light for any job. It is a bright, reliable choice for living rooms, garages, warehouses, offices, workshops, basements, convenience stores, retailers, classrooms, and more. Experience high color-rendering, for more vibrant, true-to-life colors. T4815/4CCT/AB/LED/2 lights offer flicker-free instant-on illumination with no warm-up time. They are mercury-free and shatter-resistant, for safe and easy disposal. Lower heat emission extends the life of the tube and prevents lamp ends from blackening. The estimated energy cost is only $2.17 per year. Switch to Type AB LED linear lights for your space and get up to 50,000 hours of superior light. That's 45.7 years with 3 hours of daily use.