I bought some electric candles. They can go months on a AA nimh battery, and if you pay enough for them, they are actually good / realistic enough for the wife's relaxation. Great for power outages as well.
But I just like the 'ambiance' too much. There are always different levels of risk adverseness: if I was considering candles a pollution health hazard I should also stop riding motorcycles, vaping various things, and stop eating like I do...
Also they have an optional 24-hour timer so they'll remember to turn on the same time you turned them on yesterday.
https://www.potterybarn.com/products/flameless-outdoor-candl...