Two Stage Half-Light®

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.

Switch Sequence

Switch On
Activates ballast 1 only (50% light)

Switch Off, then On
Activates both ballasts (full light)

Three Stage Half-Light®

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.

Switch Sequence

Switch On
Activates ballast 1 only (33% light)

Switch Off, then On
Activates ballast 2 only (67% light)

Switch Off, then On
Activates both ballasts (full light)