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  • Brand: Keystone
  • Lamp Type: F24T5/HO, FT24W/2G11, FC9T5, FC12T5, FT40W/2G11, FT36W/2G11 or F39T5/HO
  • Number Of Lamps Controlled: 1 or 2
  • Voltage: 120-277
  • Starting Method: Program
  • Power Factor: High
  • Ballast Factor: Normal
  • Min Start Temp: -0 Degree F, -18 Degree C
  • Warranty: 5 Years
5 Year Warranty UL Listed



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Made by a Pennsylvania company with seven decades of experience in the lighting industry, the Keystone electronic ballast for one or two lamps from is a programmable start ballast. That means it will be easy on the lamps it controls, extending their life.

At the same time, this durable, reliable ballast is built to last, and Keystone backs this product with a five-year warranty with a no-questions-asked policy.

This efficient 120-277V ballast can power one or two T5 lamps, including the F24T5/HO, the FT24W/2G11, and the FC9T5. It has a high power factor and a normal ballast factor, with a minimum start temperature of 0 degrees Fahrenheit.

This ballast is available from at substantial savings with fast shipping right to your door, saving you the time, hassle and expense of driving around looking for materials and waiting in line. Our friendly staff can give you knowledgeable, free advice about how the Keystone ballast for one or two lamps can fit into your plans and save you money.


  • Length: 9.45”
  • Width: 1.35”
  • Height: 1.06”
  • Mounting: 8.96”
  • Weight: 1.11 lbs

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