There is a Sabbath observance that we would encourage for all Mithraists in Asha. That is the light that is lit at sundown on Friday and is extinguished on Saturday at sundown.
This light (ideally a brazier, but can be a hearth, a fireplace, a group of candles or a single candle. It can even be electronic like an electric candle …especially if there are any fire hazards to worry about.).
The fire represents Mithra