Economy Channel Standard, 120V Bronze Finish Tri-phosphors also increase the lumens/watt

Tri-phosphors also increase the lumens/watt output of  the lamp

INCLUDED IN THE BOX: (2) 7 WATT DIMMABLE FILAMENTS (G40) 2700K APPLICATIONS: CEILING FIXTURE

so no replacement battery is necessary

you'll need to replace bulbs less often

Economy Channel Standard, 120V Bronze Finish Tri-phosphors also increase the lumens/wattSpecifications; Snap on components for easy assembly and maintenance; Versatile end plate doubles as coupler for continuous row mounting; Available in lengths from 18 to 96 inches; Surface, stem or chain mountableApplicationsFluorescent channel fixture. For use in indoor applications such as factories, warehouses, workshops, utility areas, coves and public buildings.