I have a bank of 13 lights at church. They are LED. They have a gray and purple wire hooked up to nothing. There also are no control wires going from the switch to any of them. I tried a digital caseta dimmer, but got a bunch of flickering. I pulled a light and found the purple and gray wires and that it has a controller mounted on top of the light itself. The controller says dimmable with TRIAC switch. How do I know if a switch is a TRIAC dimmer switch? Is there something else I could try?

We didn't have a dimmer before. They were just on standard single pole switches. The lights were broken up into two banks on two switches. We just desire more options than 100% on or off.

 

Welcome to the forums.

In order for us to comment..... you'll need to post a link or a picture of what you have.
Some LED fixtures use a driver/power supply that requires 0-10v for dimming.
How-to-insert-pictures.

I also install and service sound systems.
Make sure your LED lights..... especially dimming.... don't come thru the sound system.