It is his 1998 Christmas musical The Gift, and sheet music for this is available from his website.
Lead singer with choir, guitar backing:
Professionall produced version, children's choir:
Solo singer, professional video:
Cathedral choir with organ:
Like a candle flame, flick’ring small in our darkness,
Uncreated light shines through infant eyes.
God is with us, alleluia, come and save us, alleluia, alleluia.
Stars and angels sing, yet the earth sleeps in shadows;
can this tiny spark set a world on fire?
Yet His light shall shine from our lives, spirit blazing,
as we touch the flame of His holy fire.