Light Control

Half-Light Ballast Controller: for Use with 4-Lamp Fixtures


The Two Stage Half-Light® (HAF2) is designed for a 2-ballast, 4 lamp fixture where each ballast controls two lamps. Within this configuration, an initial toggle “on” of the wall switch activates only one ballast to produce 50% light; by toggling the switch “off” then “on” again, both ballasts will be activated to deliver full light output. The sequence can be easily restarted by holding the switch in the “off” mode for at least 5 seconds.

  • Up to 50% energy savings
  • Uses existing wall switch
  • Installs easily in wiring compartment of light fixture
  • Bi-level lighting control
  • Passive energy savings
  • 120 Vac / 208-277 Vac
  • Does not change voltage waveform
  • Can be used with motion sensing switches
  • Low cost
  • Potential 2 year ROI
  • Made in USA
  • UL Listed, C-UL, CE approved

* Minimum order 100 pieces
* Lead time 6-8 weeks from date of order

Additional information

Weight 0.25 lbs
Dimensions 3.75 × 1.66 × 0.24 in


Datasheet Download
Terms and Conditions of Sale Download


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