The Scotts also have a blessing similar to the one of Irish origin. This Celtic prayer begins as:
“May the blessing of light be on you - light without and light within.
May the blessed sunlight shine on you like a great peat fire,
so that stranger and friend may come and warm himself at it.
And may light shine out of the two eyes of you,
like a candle set in the window of a house,
bidding the wanderer come in out of the storm.”
You can read the full prayer here.