When exactly during kiddush on Friday night should one look at the candles?
In principle, for the duration of kiddush one should look at the kiddush cup. Rema (271:10), based on Darchei Moshe (8) writes that one should look at the candles during vayechulu, and at the kiddush cup during kiddush. According to the second reason mentioned by Maharil (quoted in Darchei Moshe), one should look at the candles for the duration of kiddush. This is not the common custom.