Looking for (2) switches or knobs, for spot lights to change from red to clear on outside under spot
He's asking about the black switch under the spotlight on a Unity 10300:Welcome to the group... I am wondering exactly what you are looking for. There is a lot more than just the switch, to convert what you have to what you want. Post some pictures, and I might be better able to assist you. I was just doing a mental inventory of my many used and nos Unity spotlights, because I am looking for a particular item that I know that I have, just don't know where it is.
Probably find them here
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