I also just use a plug in under counter light. It's similar to this:
https://www.amazon.com/GE-Linkable-C...+light+plug+in
I attached it to the side of my frame but found that it is much more effective just laying it on the quilt and moving it around as needed. My frame is near a window and sometimes I turn off all the machine lights and sometimes not. Just need to experiment a bit.