Light Control

Half-Light Ballast Controller: for Use with 6-Lamp Fixtures


The Three Stage Half-Light® (HAF3) is designed for a 6 lamp fixture where one ballast controls two lamps and the other ballast controls the remaining four lamps. Within this configuration, an initial toggle “on” of the wall switch activates ballast one only to deliver 33% light; toggling the switch “off” then “on” again will activate ballast two only to produce 67% light, and by toggling the switch “off” and “on” again a final time, both ballasts will be activated to deliver full light output. Like the Two Stage Half-Light®, 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 0.227 lbs
Dimensions 3.75 × 1.66 × 0.24 in


Datasheet Download
Terms and Conditions of Sale Download


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