2 ft. Toggled [120-277VAC] Ultra-high Lumen Output Direct-wire LED tubes (12-Pack; 4000K Cool White) are designed to replace all T8 and T12 fluorescent tubes to significantly lower energy [up to 70%] and maintenance costs while improving overall quality of light. Delivers best-in-class 2000 lumen output per tube. Powered via direct-wire/Type B/Ballas Bypass technology so they do not require the use of fluorescent ballasts which eliminates future ballast replacement costs as well as the associated buzz, noise and flicker. When not previously wired to direct-wire technology, rewiring is required (typically under 10 minutes).