Couldn't you run seperate swithes for each set of wires going to each bulb? That way, when the ballast is turned "on", you could control each set of bulbs by it's own switch.( 2 regular, one actinic for day/dusk effects?) I am not an electrician, but I don't see why this couldn't work....maybe Skippy or another site electrician can pipe in on this one.