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  • Brand: Keystone
  • Lamp Type: F28T5/HE, F21T5/HE or F14T5/HE
  • 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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Description stocks the Keystone electronic ballast for one or two lamps, including the F28T5/HE, F21T5/HE and F14T5/HE. Now in its third generation of family ownership, this Pennsylvania company is known for its quality products, which have less than an 0.1 percent defect rate. Keystone backs up this quality electronic ballast with a five-year warranty and is known for its no-questions-asked return policy.

This 120-277V ballast features a program start, which means that it will be easy on the equipment that it controls, adding to its longevity. The power factor is high, and the ballast factor is normal. Minimum start temperature is 0 degrees Fahrenheit.

If you have any questions about how to fit this Keystone electronic ballast into your lighting plans, just give us a call at our toll-free number, use our quick and easy online chat form or website questions form, or email us. Our staff of trained lighting experts will give you no-nonsense answers that will help you complete your project economically and with satisfying results.


  • Length: 9.45”
  • Width: 1.35”
  • Height: 1.06”
  • Mounting: 8.96”
  • Weight: 1 lbs

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