The Talmud actually depicts Zoroastrians as being the most difficult of people, and speaks of times when lighting Hanuka candles were prohibited because of a Zoroastrian holiday that sometimes coincided with it on which no fires were permitted, and the Zoroastrians were most intolerant about enforcing this. I don’t remember the exact citation, but in terms of dealing with gentiles, in ascending order, Zoroastrians were the worst, pre-Christian(?) Europeans were considered next up, and pre-Islamic Arabs were regarded as the most affable.
I’m sure you know what the Talmud says, but I can also tell you that lighting candle(s) for any religion, pagan, jew, or otherwise has never been prohibited in Zoroastrianism. And there is no such prohibition in Zoroastrian faith due any Zoroastrian holiday . More so because Zoroastrians actually believe in Light (candles incl.) as a symbol of goodness, as opposed to darkness.
In terms of other stuff about dealing w/ “gentiles”, let me know when you remember the exact citation. I’d be interested. Thanks.