12-21-2018, 11:12 PM
I use a variac most of the time but I also built a dim bulb tester. I used my 3d printer to make the case, and it uses 3 bulbs that can be switched in and out. It has another switch that can be used to bypass the bulbs, and yet another to bypass the ammeter if I am testing something that draws more than 1A. There is a digital volt/amp meter that measure the voltage applied to the load as well as the current drawn.
Rich
Rich