This is Paul Mason’s setting of the Pentecost Sequence attributed to Robert II, King of France and translated by Edward Caswell.
This is another fantastic melody and it is frustrating not be able to hear his proper arrangement anywhere. You can buy the sheet music in the collection, Hymns and Spiritual Songs Vol 1 at Liturgical Song.
I made a version nonetheless:
1 Holy Spirit, Lord of Light,
From the clear celestial height
Thy pure beaming radiance give.
Come, thou Father of the poor,
Come, with treasures which endure;
Come, thou Light of all that live!2 Thou, of all consolers best,
Thou, the soul’s delightful guest,
Dost refreshing peace bestow;
Thou in toil art comfort sweet;
Pleasant coolness in the heat;
Solace in the midst of woe.3 Light immortal, Light divine,
Visit thou these hearts of thine,
And our inmost being fill:
If thou take they grace away,
Nothing pure in us will stay;
All our good is turned to ill.4 Heal our wounds, our strength renew;
On our dryness pour thy dew;
Wash the stains of guilt away:
Bend the stubborn heart and will;
Melt the frozen, warm the chill;
Guide the steps that go astray.5 Thou, on us who evermore
Thee confess and thee adore,
In thy sevenfold gifts, descend:
Give us comfort when we die;
Give us life with thee on high,
Give us joys that never end.