Another issue from my church's lighting. I am looking at moving some troffers and saw last thing yesterday that at least 1 pair of lights are primary/secondary (master/slave). I hadn't noticed any of them there before when changing ballasts all around, probably about 100. These are 2x4 with 3 lamps each. Church is considering dimmer ballasts for them. I have to check with supply house if they can be dimmed or if I should get a kit & convert the secondary to a primary. I never saw the value in this setup to begin with. Moving 1 will mean having to move the other, disconnect it or set a box in between with another whip.
I installed a few of these in the mid 90's & was under the impression they were on the way out then. But these would have been installed about 2004.
Anyone still installing these in your locations?
Yes, I'll be happy to do a first class job for less than anyone else and take a dollar a week for 10 years.