Plug & Play 24 inch T8 LED replace F20T12 and F17T8 w/o retrofit
Converting T12s to LED: Here are your replacement options
2ft Led Light Tube 8w Led Replacement For 24 Inch T8 T10 T12 Fluorescent Bulb 20 | eBay
JESLED T8 T12 4FT LED Type B Tube Light Bulbs, 24W 6000K-6500K, 3000LM, 48 Inch LED Replacement for Flourescent Tubes, Remove Ballast, Dual-end Powered, Clear, 4 Foot Garage Warehouse Lights(12-Pack) - Amazon.com
8ft T8 / T12 LED Tube - 2 4-foot Sections - 36W - 5040 Lumens - Dual End Electric Ballast Compatible Type A - 75W Equivalent - 5000K | Super Bright LEDs
JESLED 4FT T8 LED Type B Tube Light Bulbs, 24W 5000K Daylight, 3000LM, 4 Foot T12 LED Replacement for Flourescent Fixtures, Frosted, Double Ended Power, Remove Ballast, Warehouse Shop Lights (25-Pack) -
Plug & Play F72T12/HO, High Output T-12 Recessed D.C. (RDC) Lamp
Feit Electric 40-Watt 4 ft. T12 G13 Type A Plug and Play High Output Linear LED Tube Light Bulb, Daylight 5000K (2-Pack) T1248HO/850/LED/2/RP - The Home Depot