May the Long Time Sun Shine Upon You,
All Love Surround You,
And the Pure Light Within You,
Guide Your Way On
Source: Incredible String Band; Irish Blessing
This song has become the blessing used to end Kundalini Yoga classes. Yogi Bhajan said that this is our closing prayer, and so is used to end a Kundalini Yoga practice, along with three repetitions of Sat Nam.
This mantra information is from Spirit Voyage