SATCO|NUVO's S11666 LED 4-foot, 18.5W Flicker-Free Lamps offer smooth, continuous light with less than 2-percent flicker. Ideal for use in offices, retail applications, and safe for use in commercial kitchens with the PET coated shatterproof tube. Extending the versatility of these lamps, they are 120V-277V range voltage compatible in ballast bypass configurations, and allow for 5-CCT selection at the time of installation to customize light output to the environment.