The T8-4FT is an industry-leading 18W LED Tube (Type-A+B) replacement lamp producing 130 lumens per watt.
    
TYPE A+B , Ballast compatible use with ballast or without ballast, AC 120-277 V. 
  
It has anti-UV Frosted      Polycarbonate Lens for even light transmission and to prevent      discoloration.
  
Designed with aluminum backing      for maximum heat dissipation,G13 2 pin socket 
  
Suitable for replacing 4-FT      linear fluorescent lamps in commercial and industrial locations: general      indoor, lobbies, offices, meeting rooms, restrooms, hallways, hallways, workstations,      warehouses, manufacturing, packaging, parking garages, and covered decks.