Robertson RSU135T5120 /A EnergyStar 35W T5 Ballast


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The Robertson RSU135T5120 /A is a Magnetic Ballast that operates (1) F21T5 lamp 120 at 120V This ballast is great for areas that require normal lighting! Preheat Rapid start ballast is typically used in offices, board rooms, and retail. Also operates F28T5, and Fluorescent lamps.


  • Type: Electronic Fluorescent
  • Start Method: Preaheat Rapid Start
  • Lamps: one F21T5
  • Input Voltage: 120V
  • Lamp Wiring: Parallel


  • Crest Factor: 1.4
  • Maximum Temperature: 90º
  • Sound Rated Class A
  • 55% power factor
  • 5 years warranty


  • Length: 9.06″
  • Height: 0.97″
  • Width: 0.91″



  • UL & cUL Listed
  • Class P, Type 1 Outdoor
  • ANSI C82.1
  • RoHS
  • FCC part 18 class B consumer


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