Converting T12s to LED: Here are your replacement options
LED T8 Universal Bulbs - Choose Your Options
Products - Lighting Ballasts and LED Drivers - Delta Americas
18W VersaT8 LED Tube - Low Priced Ballast Compatible or Bypass Tubes – Green Light Depot
SL1-800-100W 55-95W 230V UV Lamps Electronic Ballasts with 5V DC LED Indicator for Water Treatment Air Purification and Waste Gas Treatment - - Amazon.com
T8 LED Lamps Q&A - Retrofitting, Ballasts, Tombstones
T8 Rohs Electronic Compatible Led Tube Ul 32w Quad Light Lamp Ballast - Buy Rohs Electronic Ballast T8 Ballast Compatible Led Tube Hpf 32w,Rohs Electronic Ballast For T8 3x32w Ul Ballast,Rohs Electronic