We also do this. I did not, growing up conservative, but Pygment says she always has and so we do now.

I thought candlelighting at eve of holidays was traditional for all branches of Judaism, and then the yahrzeit candle for Yom Kippur because it is one of the four times a year when those who have been appropriately bereaved say Yizkor. As above, it was one of my family's few ritual constants, especially after my grandmother died. How did your family do it?

I remain agnostic and non-congregational, but feeling much better for having connected with a community (albeit peripherally) that unites my childhood traditions, ethical beliefs, and modern political leanings.

I am glad then that you have that.