Halakhah к Эруви ́н 6:11

1. The Time to Kindle the Shabbos Lights, 4 Seifim: If there is a doubt as to whether it is dark, this is bein hashemashos (this is the amount of time to walk 3/4 of a mil after shekiat hachamah (Tur) [a mil is 1/3 of an hour less than 30 minutes; A mil is a Talmudic measure of distance equivalent to approximately 960 meters (.596 of a mile) according to Shiurei Torah.]) we do not tithe what is certain, we do not immerse the vessels, we do not light the candles and we do not establish the eiruv techumim [A halachic construct enabling a person to extend the 2000 cubit distance – approximately a kilometer – that he is permitted to walk beyond a city’s Shabbos limits. Employing an eruv techumin enables a person to walk an additional 2000 cubits (Rambam, Mishneh Torah, Hilchos Shabbos 27:1; Hilchos Eruvin 6:1-2)] (See Siman 415, Seif 2). However, we do tithe the Demai [Produce concerning which there is a question whether it was tithed or not. As a stringency, our Sages required tithes to be separated from it], and we insulate hot things and we establish the eiruv for the courtyard (And see Siman 393). It is permissible to say to a non-Jew during bein hashemashos to light a candle for the needs of Shabbat. And also it is permitted to tell him to do any work that is required for a mitzvah or it is a taxing and pressing matter. RAMA: And therefore one who accepts Shabbat upon himself an hour or two before nightfall can tell (the non-Jew) to light the candle and direct him to do other things he may need [Mahari"v]