Does it have 1, 2, or 3 cords to plug in? Typical 2 - 96 watt lamp fixtures have two ballast so you can do the dusk till dawn effect. And the ballast should be electronic without starters. If it is just a one ballast fixture it should be a workhorse 7. Which is readily available. Maybe it is just a switch, some of the later CF fixtures used low voltage fans and ran off a different switch.