As there really is no wrong way to do this, do your best to receive the words that come present for you. Remember the simple intention of calling in the Light is that either you, or the group, come into greater attunement with Spirit – so whatever words evoke or call that into greater awareness for you – follow that.
Here’s one sample of calling in the Light:
“Father – Mother – God, we ask just now to be placed within the Light of the Christ, and that through the Holy Spirit, only that which is for the Highest Good be brought forward. We ask for the presence of the Mystical Traveler Consciousness to be with us just now. We ask this with perfect love and perfect understanding, keeping in mind our true destinies on this planet. We’re always glad to be of service, Father, and for this we give our thanks. Thy will be done. So be it.”